Controlling the Output Using External Analog Signals

The output can be controlled using external analog signals by installing the analog signal interface board (EX05-PCR-LE/ EX06-PCR-LE) to the slot3.

For details of installing the board on the PCR-LE, see the setup guide of EX05-PCR-LE/EX06-PCR-LE.

• Amplifying the input waveform (EX05-PCR-LE only)

 

 

• Varying the voltage of the output AC waveform using DC signals (EX06-PCR-LE only)

 

• SIGNAL I/O Connector

• Controlling the PCR-LE2 through external contacts

You can turn the output on and off, execute and stop sequences, clear alarms, and shut down the output.

• Monitoring the operation status

You can monitor the output status, alarm status, busy status, current peak limit status, and overload status.

 

Names and functions of the parts of the analog signal interface board

 

Name	Description
INPUT	BNC terminal for applying the external signal Input terminals is electrically isolated from the output terminals of the PCR-LE2.
GAIN	Variable resistor for fine adjusting the gain (voltage amplification ratio)
OFFSET	Variable resistor for fine adjusting the offset
AUX	This is a connector for options.
SIGNAL I/O	Connector for controlling the PCR-LE2 through external contacts

Amplifying the input waveform (EX05-PCR-LE only)

You can use the PCR-LE2with EX05-PCR-LE as a power amplifier that simply amplifies the input waveform or use it to add an external signal to the PCR-LE2 Series signal source.

Selecting the signal source

Select which signal source to use to control the PCR-LE2 Series.

• Internal signal source (INT)

Output the PCR-LE2 Series signal source. External signal sources are not used.

• Internal signal source and external signal source (INT+EXT)

Output the sum of the PCR-LE2 Series signal source and an external signal source.

If you select INT+EXT, the PCR-LE2 Series settings will be changed as follows:

Action to perform when the current limit is exceeded: Turn the output off

Internal Vcc: FIXED: (previously set value)

Compensation function: OFF (when soft sensing or regulation adjustment is selected)

Displays the phase voltage (Single-phase three-wire output or three-phase output only)

• External signal source (EXT)

The EX05-PCR-LE amplifies the external signal (0 Vrms to 1.5 Vrms) 100 times when L range is selected and 200 times when H range is selected and outputs the resultant voltage.

If you select EXT, the PCR-LE2 Series settings will be changed as follows:

Action to perform when the current limit is exceeded: Turn the output off

Synchronization function: OFF

Output on/off phase control: FREE

Internal Vcc: FIXED: (previously set value)

Compensation function: OFF (when soft sensing or regulation adjustment is selected)

Soft starts: OFF

Displays the phase voltage (Single-phase three-wire output or three-phase output only)

Press OTHERS (SHIFT+MEMORY), EXT SIG(F4) and then SOURCE(F1) to set the signal source.

 

Item	Title	Description	Condition in which the function key cannot be used
INT	Signal Source	Use the internal signal.	Output on
EXT		Use the external signal.
INT+EXT		Use the internal signal and external signal.

 

Selecting the polarity

Select whether to output a signal whose polarity is the same as or opposite to that of the input signal.

Press OTHERS (SHIFT+MEMORY), EXT SIG(F4) and then POL(F2) to set the polarity.

During single-phase, three-wire output and three-phase output, press OTHERS (SHIFT+MEMORY), EXT SIG(F4), and then press the key that corresponds to the phase that you want to set, and then POL(F2) to set the polarity.

 

Item	Title	Description
NORM	Signal Polarity U Signal Polarity*1 V Signal Polarity*1 W Signal Polarity*2	Output a signal whose polarity is the same as the input signal.
INVERT		Output a signal whose polarity is opposite to that of the input signal.

*1. Single-phase three-wire output and three-phase output only

*2. Three-phase output only

Controlling the Output Using External Analog Signals (Cont.)

Amplifying the input waveform (EX05-PCR-LE only)

Setting the aperture time (only when using EXT)

To use an external signal source (EXT), set the aperture time.

If the aperture time is not set, the voltage and current that are being output may be different from what are displayed on the panel.

The aperture time setting was added in firmware version 5.00. As a result, the function for setting the estimated minimum frequency that was available in firmware version 4.99 and earlier is no longer available.

Setting the internal Vcc

If you set the signal source to EXT or EXT+INT, the internal Vcc is changed to a fixed value. Set the Internal Vcc value to the voltage that you want to output (peak value) + 10 V.

If the internal Vcc is set to a value greater than the actual output voltage, the protection function may be activated. If the internal Vcc is set to a value less than the actual output voltage, a few hundred milliseconds of response delay will occur.

Outputting the signal

After you set the signal source, polarity, and the estimated minimum frequency (EXT only), apply an external signal to the INPUT terminal.

1	Check that the POWER switch is turned off.
2	Connect an external signal (generator) to the INPUT terminal.
3	Turn the POWER switch on.
4	Press the RANGE (SHIFT+8) key to set the voltage range (L/H)
5	Apply an external signal to the INPUT terminal.
6	Turn the OUTPUT on.

 

Fine adjusting the offset

You can fine adjust the offset by turning the OFFSET variable resistor using the adjustment screwdriver. Adjust the offset so that the output voltage is as close to 0 Vdc as possible with the input terminal shorted.

Fine adjusting the gain

You can fine adjust the gain by turning the GAIN variable resistor using the adjustment screwdriver. Adjust the gain so that the output voltage is 150 Vac (L range) when 1.5 Vac is applied to the input terminal.

Functional limitations

If you use an external signal, you will not be able to use the following functions, in addition to the settings that were changed when you selected the signal source.

• When the internal signal source plus the external signal source are used

Harmonic current analysis function

• When the external signal source is used

Setting the output voltage, voltage limit

Setting the frequency, frequency limit

Using memory

Special waveforms

Harmonic current analysis function

Power line abnormality simulations

Sequence function

Phase difference (Single-phase three-wire output or three-phase output only)

 

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Varying the voltage of the output AC waveform using DC signals (EX06-PCR-LE only)

When AC mode or AC+DC mode is selected, the PCR-LE2 with EX06-PCR-LE outputs AC voltage ranging from 0 V to 150 V (when L range is selected) or 0 V to 300 V (when H range is selected) with respect to a DC signal input ranging from 0 V to 10 V.

Selecting the signal source

Select whether to control the output AC voltage using an external signal.

Press OTHERS (SHIFT+MEMORY) and then, VPROG(F4) to set the signal source.

 

Item	Title	Description	Condition in which the function key cannot be used
ON	VProg	Control the AC voltage using an external signal	OUTPUT on Soft start: ON
OFF		Do not control the AC voltage using an external signal

Outputting the signal

After you set the signal source, apply an external signal to the INPUT terminal.

1	Check that the POWER switch is turned off.
2	Connect an external signal (generator) to the INPUT terminal.
3	Turn the POWER switch on.
4	Press the OPR MODE > ACDC(F2) to set the output mode (AC/ AC+DC).
5	Press the RANGE (SHIFT+8) key to set the voltage range (L/H).
6	Press F > FREQ(F1) to set the frequency (1.0 Hz to 999.9 Hz).
7	Apply an external signal to the INPUT terminal.
8	Turn the OUTPUT on.

Controlling the Output Using External Analog Signals (Cont.)

Varying the voltage of the output AC waveform using DC signals (EX06-PCR-LE only)

Fine adjusting the offset and the gain

You can fine adjust the offset by turning the OFFSET variable resistor using the adjustment screwdriver. You can fine adjust the gain by turning the GAIN variable resistor using the adjustment screwdriver.

1	Apply 1 Vdc to the INPUT terminal.
2	Turn the OUTPUT on.
3	Using an adjustment screwdriver, adjust the OFFSET variable resistor so that the output voltage is at 15 Vdc (L range).
4	Apply 10 Vdc to the INPUT terminal.
5	Using an adjustment screwdriver, adjust the GAIN variable resistor so that the output voltage is at 150 Vdc (L range).
6	Apply 1 Vdc to the INPUT terminal, and check that the output voltage is 15 Vdc (L range). If it is not, repeat steps 1 to 5 until the output voltage is 15 Vdc (L range). When you adjust either the offset or the gain, the other value that you adjusted before may shift. Be sure to double-check both values.
7	Turn the OUTPUT off.

Functional limitations

If an external signal is used, you will not be able to use the following functions.

Setting the output AC voltage

Soft starts

Power line abnormality simulations

Sequence function

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SIGNAL I/O Connector

 

Pin arrangement and connection

To control the PCR-LE2 Series through external contacts, use pins 6 to 10 of the SIGNAL I/O connector.

To monitor the operation status of the PCR-LE2 Series, use pins 1 to 5 of the SIGNAL I/O connector.

Remove the covering from each wire over a distance of 9 mm to 10 mm (10 mm is recommended).

 

Pin	Signal Name	Description
1	OUTPUT ON STATUS	Output on status monitor
2	ALARM STATUS	Alarm status monitor
3	OOR STATUS	Current peak limit status and Overload status monitor
4	BUSY STATUS	Busy status monitor
5	STATUS COM	Output signal common
6	OUTPUT CONTROL	Output on/ off control
7	SEQ RUN	Sequence execute/ stop
8	ALARM CLR	Alarm clear
9	SHUT DOWN	Shut down the output
10	COM	Input signal common

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Controlling the PCR-LE2 through external contacts

Wiring

To minimize the influence of noise on the output, use a two-core shielded wire or a twisted-pair wire to connect the control terminals and the external contact. Make the wires as short as possible. Susceptibility to the effects of noise increases as the wires get longer. When wires are long, proper operation may be hindered even if a cable with anti-noise measures is used.

The release voltage across pins is approx. 12 V maximum, and the short circuit current is approx. 8.5 mA maximum. (The internal circuit is pulled up to 12 V through 1.3 kΩ.)

Use parts with a contact rating of 12 Vdc and 8.5 mA for the external contact.

High level input voltage (HIGH): 11 V to 12 V, or open circuit

Low level input voltage (LOW): 0 V to 1 V

When using a shielded cable, connect the shield to the chassis.

 

For long-distance wiring

When wiring over a great distance, use a small relay and extend the coil side of the relay.

 

 

Controlling the Output Using External Analog Signals (Cont.)

Controlling the PCR-LE2 through external contacts (Cont.)

Controlling the Output On/ Off

Use pins 6 to 10 of the SIGNAL I/O connector to turn the output on and off through external contacts.

If multiple units are used under floating conditions and a single external contact is used to turn on/off the output, isolate the signal to each unit such as by using a relay on the external contact signal.

Press CONFIG (SHIFT+OPR MODE), EXT.OPT(F2), CONTROL(F1) and then, OUTP ON(F1) to set the external control logic of output on/off.

 

Item	Title	Description
DISABLE	OutputOn Control	Do not turn the output on and off through external contacts.
HIGH		Turn the output on with a high signal.
LOW		Turn the output on with a low signal.

If the output is set to off using an external contact, the OUTPUT key on the front panel is invalid. If you do not want to control the output through external contacts, set the output control logic to DISABLE.

The figure below shows an example of output on/off control when a high level signal turns the output on.

 

When a sequence is running, the output on/off control through external contacts is invalid.

Controlling the Sequence Execute/Stop

Use pins 7 to 10 of the SIGNAL I/O connector to turn the sequence execute and stop through external contacts.

Press CONFIG (SHIFT+OPR MODE), EXT.OPT(F2), CONTROL(F1) and then, SEQ RUN(F2) to set the external control logic of sequence run/stop.

 

Item	Title	Description
DISABLE	SeqRun Control	Do not execute/stop the sequence through external contacts.
HIGH		Execute the sequence with a high signal.
LOW		Run the sequence with a low signal.

When a sequence is stopped through external contacts, RUN (F1) on the front panel is invalid. If you do not want to control the sequence through external contacts, set the output control logic to DISABLE.

The figure below shows an example of sequence execute/stop control when a high level signal execute the sequence.

 

Clear alarms

Use pins 8 and 10 of the SIGNAL I/O connector to clear alarms through external contacts.

Press CONFIG (SHIFT+OPR MODE), EXT.OPT(F2), CONTROL(F1) and then, ALMCLR(F3) to set the external control logic of alarm clear.

 

Item	Title	Description
DISABLE	AlarmClr Control	Do not clear alarms through external contacts
HIGH		Alarm clear with a high signal.
LOW		Alarm clear with a low signal.

Shut down the output

Use pins 9 and 10 of the SIGNAL I/O connector to shut down the output through external contacts. This takes precedence over the feature that turns the output on and off through external contacts.

When the output is shut down, “TRBL-19 EXT.SHUTDOWN” appears on the panel.

Press CONFIG (SHIFT+OPR MODE), EXT.OPT(F2), CONTROL(F1) and then, SHUTDOWN(F4) to set the external control logic of shutdown.

 

Item	Title	Description
OPEN	Shutdown Control	Turn output off with open circuit (input voltage: 11 V to 12V).
SHORT		Turn output off with short circuit (input voltage: 0 V to 1 V).

Recovery

Turn the POWER switch off.

If the external control logic is OPEN, short pins 9 and 10, and turn the POWER switch on.

If the external control logic is SHORT, open pins 9 and 10, and turn the POWER switch on.

Controlling the Output Using External Analog Signals (Cont.)

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Monitoring the operation status

You can externally monitor the following operation status of the PCR-LE2.

• Output (OUTPUT ON STATUS)

Use pins 1 and 5 of the SIGNAL I/O connector.

The signal turns on when the output is on.

• Alarm occurrence (ALARM STATUS)

Use pins 2 and 5 of the SIGNAL I/O connector.

The signal turns on when an alarm or trouble occurs.

• Current peak limit and overload (OOR STATUS)

Use pins 3 and 5 of the SIGNAL I/O connector.

The signal turns on when the current limit is exceeded (OVERLOAD indication) and when current peak is being limited (IPKLIM indication).

• Busy (BUSY STATUS)

Use pins 4 and 5 of the SIGNAL I/O connector.

The signal turns on when the output cannot be turned on (busy status).

For a few seconds when the sleep function is disabled

For approx. 0.6 seconds when the output voltage range is switched

For approx. 120 seconds when the current limit is exceeded

For approx. 120 seconds when the internal semiconductor protection is activated

For a few seconds when the output phase is switched

For a few seconds when the output method for single-phase three-wire output is switched

The output signals are open collector outputs of photocouplers (30 Vdc, 8 mA); they are insulated from the internal circuits of the PCR-LE2.

Maximum voltage: 30 V

Maximum current (Sink): 8 mA

 

Selecting the phase to monitor (PCR27000LE2 only)

If you want apply current peak limit and overload monitoring (OOR STATUS) during single-phase three-wire output or three-phase output, you can select whether to monitor the entire system or each phase. To monitor each phase, an analog signal interface board must be installed for the phase that you want to monitor.

Press CONFIG (SHIFT+OPR MODE), EXT.OPT (F2), STAT.OUT (F2) and then, LMT STAT (F1) to select the phase that you want to monitor.

 

 

Item	Title	Description
TOTAL	OOR Status Out	Monitor the entire system and output the status.
EACH		Monitor the phase for which the board is installed and output the status.

 

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