Setting the MCU's communication ports during RUN mode via the output (Y) flags
16 I/Os for Y are allocated. I/O addresses are determined depending on the installation location and the I/O allocations of the other units.
Output signal |
Name |
Description (0: OFF, 1: ON) |
Effective operation mode |
|
|---|---|---|---|---|
COM 1 |
COM 2 |
|||
Y10-Y17 |
Y10-Y17 |
Undefined |
Default setting: 0 (do not change) |
None |
Y18 |
Y19 |
RTS signal output |
The transmission from the devices communicating with the MCU can be controlled by turning this output on. Permit transmission from communicating devices: 0 Prohibit the transmission from communicating devices: 1 The CTS signal sent from the communicating devices can be monitored via X8 and X9. |
Effective only when setting the RS/CS to be valid and using the RS232C communication cassette. |
Y1A-Y1D |
Y1A-Y1D |
Undefined |
Default setting: 0 (do not change) |
None |
Y1E |
Y1F |
Request to reset CH |
Communication channels can be reset by turning on Y1E or Y1F.
After 1 is output and the completion of the reset is confirmed by XE/XF, return to 0. The reset is performed only once when this signal rises. During reset, the following operations are performed:
This function can be used to delete unnecessarily received data or to clear errors before starting normal reception. |
Program controlled communication |
The channel reset can be automatically performed by one of the following (in these cases, the reset done signal by XE/YF does not turn on):
Setting/changing communication parameters using the instruction F159_MWRT_PARA.
Changing operation modes (switching between program controlled communication and MEWTOCOL-COM Slave) using F159_MTRN.
Turning on the PLC power supply or changing from PROG to RUN mode if the MCU settings have been made via software.