
B–62075E/04
2. HARDWARE
124
(a) LED display for the PMC–NB function
1.STATUS LED display transition when the power is turned on
No. LED display NC status
1 STATUS jjjj Power–off
2 STATUS JJzz Initial state immediately after power–on or the
state in which the PMC CPU is not operating
3 STATUS jJzz Initial state. PMC initialization is in progress.
4 STATUS Jjzz Initial state
PMC ROM parity check, transfer of a Ladder or
PASCAL program to DRAM in progress, SLC ini-
tialization in progress (IPL is completed in the
CNC and the NC ready status is awaited.)
5 STATUS jjzz Normal state
2. STATUS LED display for the PMC–NB function when an error
occurs
No. LED display NC status
1 STATUS LLzz An error occurred in another PC board.
2 STATUS JLzz An error occurred during transfer to or from DI/DO.
The DRAM module module on the main CPU
board is defective.
The PMC system ROM module is defective.
3 STATUS LJzz A RAM parity error occurred in the PMC engine
module (during access to the PMC).
4 STATUS jLzz A RAM parity error occurred in the PMC engine
module or PMC SRAM module (during access to
the CPU).
5 STATUS Llzz A failure (BUS ERR, INVALID OPCODE, etc.)
occurred in the PMC function.
The PMC ROM is defective.