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CHAPTER 8 FUNCTIONS
8
8.18 Functions with an Extension Module Connected
8.18 Functions with an Extension Module Connected
The main A/D converter module permits one extension module to be connected.
● Before replacing the extension module, turn off the module power supply. Disconnecting an extension module during the
power-on of the module results in the error code (1F00H) being stored into Latest error code (RWr0), Error flag (RXA)
being turned on, and ERR. LED being lit up, which stops the operation.
● After replacing the extension module, write parameters again.
8.18.1 Functions with an extension I/O module connected
Here is the list of the available functions with an extension I/O module connected:
(1) External power supply monitoring function
This function monitors the on/off state of the external power supply with the I/O PW LED of an extension output
module indicating the state.
By using External power supply monitor request flag (RY1F), a moderate error is generated when the external
power supply is off. Thus, the ON/OFF status of the external power supply is notified and the extension output
module can be stopped.
(a) External power supply monitoring function
While External power supply monitor request flag (RY1F) is on, power off of the external power supply causes
a moderate error to occur. When using this function, check that the external power supply stabilizes before
turning on External power supply monitor request flag (RY1F). When turning off the external power supply, turn
off External power supply monitor request flag (RY1F) in advance.
(b) Setting and checking the external power supply monitoring function
Function Reference
External power supply monitoring function Page 145, Section 8.18.1 (1)
External signal assignment function Page 146, Section 8.18.1 (2)
Digital output HOLD/CLEAR setting function
(referred to as the output HOLD/CLEAR setting function in the manual of I/O modules)
CC-Link IE Field Network Remote I/O Module
User's Manual
Cyclic data update watch function
Input response time setting function
Number of ON times integration function
Item Description Reference
External power supply monitor request flag (RY1F)
Set whether to enable or disable the external
power supply monitoring function.
Page 200, Appendix 1.2 (7)
External power supply monitor status flag (RX1F)
Indicates whether the external power supply
monitoring function is enabled or disabled.
Page 196, Appendix 1.1 (11)
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