Yaskawa MP920 User's Manual Design - Manual (Page 267)

5 Modules
5.5.1 Servo Module (4-axis)
5-72
Normal
operation One of Servo Module numbers 1 to 16 will be dis-
played. The Servo Module is operating normally
and there is no error or alarm.
Serious fault A two-digit error code appears following F.
Examples:
F
→ 0 → 1: Watchdog timeout error
F → 0 → 2: Synchronization error
F → 4 → 1: ROM diagnostic error
F → 4 → 2: RAM diagnostic error
F → 4 → 3: Shared memory diagnositc error
F → 4 → 4: Built-in CPU timer diagnostic error
F → 4 → 5: Timer diagnostic error
F → 4 → 6: NVRAM read error
F → 4 → 7: NVRAM write error
F → 4 → 8: Illegal general instruction interrupt
F → 4 → 9: Illegal slot instruction interrupt
F → 5 → 0: CPU address error interrupt
F → 5 → 1: DMA address error interrupt
F → 5 → 2: User break interrupt
F → 5 → 3: Trap instruction interrupt
F → 5 → 4: UPD71054 diagnostic error
(cont’d)
Display Category Meaning
or
followed by error code