
B–63505EN/02
7.TROUBLESHOOTING
291
An error occurred when RAM test is being executed.
The following causes are considered :
S PMC control module is faulty.
S PMC user program is faulty (FROM and SRAM module is faulty.)
S Main board is faulty.
NOTE
1 when the main board or the FROM and SRAM module is
replaced, all the data stored in memory is lost. Set NC data
again, referring to the Data input/output item.
2 when replacing FROM and SRAM module, replace it with
one that has software equal to or more than current software
version.
3 When the FROM and SRAM module is replaced, the ladder
program stored in memory is lost. See input/output item of
PMC data and set ladder program again.
4 When the FROM and SRAM module is replaced, the NC
data stored in memory is lost.
See input/output item of data and set NC data again.
5 When the FROM and SRAM module is replaced, with using
the macro executer, the macro data is also lost. Set macro
data again after replacing.
6 When the main board is replaced, the NC data stored in
memory is lost.
See input/output item of data and set NC data again.
7 See Subsec. 2.2.1 for the specifications and locations of
module.
7.34
ALARM 950
(PMC SYSTEM
ALARM)
Causes and Remedies