Chapter 19 Test Function; External Input/Output Forced On/Off Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

19
TEST FUNCTION
In a redundant system, changed values of devices and labels are transferred from the control system to the
standby system in the END processing. If the systems are switched between the change and the tracking
transfer, the changed values are not reflected to the CPU module of the new control system.
19.1

External Input/Output Forced On/Off Function

External inputs/outputs can be forcibly turned on or off from the engineering tool. This function enables input devices to be
turned on or off regardless of the on/off state of the external inputs and enables the external outputs to be turned on or off
regardless of the operation result of a program.
In the case of external input/output forced on/off in a redundant system, forced on/off is reflected to the input/output devices of
both systems and external outputs by registering or canceling forced on/off for the control system. (Forced on/off is reflected
to both systems without setting tracking transfer setting in the CPU parameters.)
(External input)
(2)
(1)
(1) Turn off X0 forcibly.
(2) The input device is turned off regardless of the on/off state of the external input.
(3) Turn on Y0 forcibly.
(4) The external output is turned on regardless of the operation result of the program.
The external input/output forced on/off function is available for MELSEC iQ-R series modules and Q series
modules mounted on an extension base unit.
Before executing the external input/output forced on/off function, check the versions of the CPU module and
engineering tool used. ( Page 747 Added and Enhanced Functions)
19 TEST FUNCTION
232
19.1 External Input/Output Forced On/Off Function
(External output)
(3)
(4)