Mitsubishi A1SJH User Manual

7. MEMORY CASSETTE AND BATTERY
7 - 6
MELSEC-
A
7.1.5 Memory write-protect setting for an A2SNMCA-30KE
When an A2SNMCA-30KE is installed on an A2SHCPU, misuse of peripheral
devices can cause the E
2
PROM memory to be over-written. In order to prevent this
from occurring, the A2SNMCA-30KE has been provided with a memory write-
protect setting.
When the memory write-protect setting pin is in the ON position, all 64 k bytes of
the user memory area will be protected.
The memory write-protect setting pin must be moved to the OFF position in order to
allow the contents of the ROM memory to be corrected.
The pin is set to the OFF position before shipment from the factory.
See Section 4.1.9 regarding memory area allocation.
OFF ON
M.PRO
A2SNMCA-30KE
Memory protection
setting pin
Shows the memory
protection canceled state.
Jumpe
r

Mitsubishi A1SJH Specifications

General

Brand	Mitsubishi
Model	A1SJH
Category	Controller
Language	English