2 communication signals and operation timings, 1) controller ready (pwr), 2) emergency stop (emgs) – IAI America RCM-GW-DV User Manual

Page 87: 3) alarm (alm), 4) reset (res), Communication signals and operation timings

DeviceNet Gateway

7.2

Communication Signals and Operation Timings

(1) Controller ready (PWR)

This signal turns “1” (ON) when the controller becomes ready to perform control following the power
on.

Function

This signal turns “1” (ON) when the controller has been successfully initialized following the power
on and becomes ready to perform control, regardless of the alarm condition, servo status, etc.
Even when an alarm is present, the PWR signal turns “1” (ON) as long as the controller is able to
perform control. This signal is synchronized with the status indicator LED (green) on the front
panel of the controller.

(2) Emergency stop (EMGS)

This signal turns “1” (ON) when the controller actuates an emergency stop.

Function

This signal turns “1” (ON) when an alarm generates, when an emergency stop is actuated by the
emergency stop circuit (refer to 4.3.1), or when the motor drive power is cut off. It will turn “0”
(OFF) once the emergency stop is cancelled.

(3) Alarm

(ALM)

This signal turns “1” (ON) when the controller’s protective circuit (function) detects an error.

Function

This signal turns “1” (ON) when a protective circuit (function) operates due to detection of an error.
It will turn “0” (OFF) once the cause of the alarm is removed and the reset (RES) signal is turned
“1” (ON). (Cold-start alarms are excluded.)
When an alarm is detected, the ALM LED (red) on the front face of the alarm will illuminate. This
LED remains unlit while the controller is normal.
With ERC2-NP/PN/SE controllers, the LED at the top of the motor unit will illuminate in red. The
LED will return to green once the servo is turned on.

(4) Reset

(RES)

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] While an alarm is present, remove the cause of the alarm and then turn this signal from “0”

(OFF)” to “1” (ON), and the alarm signal will be reset. (Cold-start alarms are excluded.)

[2] While the actuator is paused, turn this signal from “0” (OFF)” to “1” (ON), and the remaining

travel will be cancelled.

PLC input signal

PLC output signal

PLC input signal