IAI America RCM-GW-PR - Manual (Page 83)

77
PfofiBus Gateway
6.2 Communication Signals and Operation Timings
(1) Controller ready (PWR) PLC input signal
This signal turns “1” (ON) when the controller becomes ready following the power on.
„ Function
This signal turns “1” (ON) when the controller has been initialized properly following the power
on and becomes ready, regardless of the alarm condition, servo status, etc.
Even when an alarm is present, the PWR signal still turns “1” (ON) as long as the controller
becomes ready.
This signal is synchronized with the status indicator LED (green) on the front panel of the
controller.
(2) Emergency stop (EMGS) PLC input signal
This signal turns “1” (ON) when the controller actuates an emergency stop.
„ Function
This signal turns “1” (ON) when a controller alarm generates, an emergency stop is actuated by
the emergency stop circuit (refer to 4.3.1), or the motor drive power is cut off. It will turn “0”
(OFF) once the emergency stop is cancelled.
(3) Alarm (ALM) PLC input signal
This signal turns “1” (ON) when the controller’s protective circuit (function) detects an error.
„ Function
This signal turns “1” (ON) when the controller’s protective circuit (function) is actuated.
It will turn “0” (OFF) when the reset (RES) signal is turned “1” (ON) after removing the cause of
the problem. (This is not the case with cold-start alarms.)
When an alarm is detected, the ALM LED (red) on the front panel of the controller illuminates.
This LED remains unlit while the controller is normal.
With the ERC2-NP/PN/SE, the LED at the top of the motor unit illuminates in red. When the
servo turns on, the LED changes to a steady green light.
(4) Reset (RES) PLC output signal
This signal has two functions. It can be used to reset controller alarms or cancel the remaining travel
distance while the actuator is paused.
„ Function
[1] When an alarm is present, you can reset the alarm by removing the cause of the alarm and
then turning this signal from “0” (OFF) to “1” (ON). (This is not the case with cold-start
alarms.)
[2] While the actuator is paused, you can cancel the remaining travel by turning this signal from
“0” (OFF) to “1” (ON).