
B–62075E/04
2. HARDWARE
117
(a) STATUS LED display for the PMC–NA function
1. STATUS LED display transition when the power is turned on
No. LED display NC status
1 STATUS jjjj Power–off
2 STATUS JJjj Initial state immediately after power–on or the
state in which the PMC CPU is not operating
3 STATUS jJjj Initial state. PMC initialization is in progress.
4 STATUS Jjjj 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 jjjj Normal state
2. STATUS LED display when an error occurs
No. LED display NC status
1 STATUS LLjj An error occurred in another PC board.
2 STATUS JLjj An error occurred during transfer from or to DI/DO.
The DRAM module to be installed on the main
CPU is defective.
3 STATUS LJjj A RAM parity error occurred in the PMC engine
module (upon accessing the BOC).
4 STATUS jLjj A RAM parity error occurred in the PMC engine
module or PMC DRAM module (upon accessing
the CPU).
5 STATUS Lzjj A failure (BUS ERR, ADDR ERR, ILL INST, ZERO
DIV, etc.) occurred in the PMC function.
The PMC ROM is defective.
(b)ALARM LED display
No. LED display NC status
1 ALARM jJj The PMC CPU asserts SYSFAIL.
2 ALARM JJj The PMC CPU is in the stop state.
3 ALARM jjJ An error (SLC error) occurred during data transfer
to or from DI/DO.
4 ALARM JJJ A RAM (RAM on the PMC engine module or PMC
DRAM module) parity error occurred in the PMC.