Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 386

Replacement Precautions
main lit while the data is being compared. If the data matches, the Indicator
will go OFF after the data has been compared.
5. Turn OFF the power to the PLC to which the Serial Communications Board
or Unit to be replaced is mounted, and to all serially connected external de-
vices.
6. Disconnect the communications cables connected to the Serial Communi-
cations Board or Unit to be replaced, and also remove the Board or Unit.
7. Set the hardware switches of the replacement Board or Unit to the same
settings of the Board or Unit being replaced before mounting, as follows:
• Unit number setting switch (Serial Communications Units)
• Terminating resistance switch (RS-422A/485 ports)
• 2-wire or 4-wire switch (RS-422A/485 ports)
8. To restore the protocol data from the Memory Card to the Serial Commu-
nications Board or Unit, turn ON pin 7 and turn OFF pin 8 on the DIP switch
on the front of the CPU Unit for which the Board or Unit was replaced.
9. Turn ON the PLC's power supply. At this point, leave the power supplies
OFF to all serially connected external devices.
When the PLC's power is turned ON, the MCPWR Indicator on the front of
the CPU Unit will light and flash once. The MCPWR Indicator will remain
lit while the data is being read. The Indicator will go OFF after the data has
been read properly.
• Serial Communications Board Operation:
The Board's RDY Indicator will flash during the restore operation and
it will be lit when the restore operation is completed normally.
If the restore operation fails, the RDY Indicator will continue to flash.
The CPU Unit's ERR/ALM Indicator will flash and bit A42409 (the Pro-
tocol Data Error Flag) will be turned ON.
• Serial Communications Unit Operation:
The Unit's RDY Indicator will flash during the restore operation. Both
the RDY Indicator and RUN Indicator will be lit when the restore oper-
ation is completed normally.
If the restore operation fails, the RDY Indicator will continue to flash
and the ERC Indicator will be lit.
If the restore operation fails, return to step 1 and perform the replacement
procedure again. If the restore operation fails two times in succession, use
CX-Protocol to transfer the protocol data to the Board. Refer to Using CX-
Protocol on page 356 for details.
10. If necessary, compare the data in the Memory Card with the protocol data
in the Serial Communication Board/Unit.
To compare the protocol data, turn OFF the PLC's power supply, turn OFF
pins 7 and 8 on the DIP switch on the front of the CPU Unit, turn the PLC
ON again, and press the Memory Card power supply switch for 3 seconds.
When the Memory Card power supply switch is pressed, the MCPWR In-
dicator on the front of the CPU Unit will flash once and then remain lit while
the data is being compared. If the data matches, the Indicator will go OFF
after the data has been compared.
11. Turn ON the power to all serially connected external devices, switch the
CPU Unit to MONITOR mode, and start the system.
12. Check the status of the Serial Communications Board or Unit's indicators
and status display and confirm that the system is operating normally.
Section 11-6
357