Mitsubishi A2USCPU(S1), User Manual

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SYSTEM CONFIGURATION 2.
(4) Writing while running when operated by the E
2
PROM (When the A2SNMCA-30KE is
installed.)
When "write while running " to the E
2
PROM is executed, the program transfer in
progress status is displayed on the peripheral device, then the processing for the
sequence program is stopped for approximately two seconds until the transfer
finishes to complete the "write while running ".
Because the program processing stops for two seconds, stop the CPU while writing
instead of executing the "write while running " when it affects the operation of the
controlled devices.
When "A3A" or "A3H" is specified as the PLC's model to startup the GPP function
software package which is not AnU-compatible, the "write while running" cannot be
executed to the E
2
PROM.
When "write while running" to the E
2
PROM is executed, the changed circuit block
and any PLF instructions included in the steps after the instructions will not operate
normally.
When the execution condition for the PLF instruction is turned off upon completion of
writing, the PLF instruction is executed.
(5) Writing while in operation by the E
2
PROM (When the A2SNMCA-30KE is installed.)
(a) When writing a program to the E
2
PROM after the GPP function software
package is started up with the PLC's model specified as "A3A" or "A3H", cancel
the memory protection of both the CPU main module and the memory cassette
for the E
2
PROM (A2SNMCA-30KE) before execution.
(b) The writing of the program cannot be executed from the computer link module or
from a peripheral device connected to other stations on the MELSECNET.
Write the program from a peripheral device connected to the RS-422 of the CPU
module.