Sony GY-2120WD Maintenance Manual page 396

6-3. Error Processing
2x 93
(ERROR 93) Inter CPU communication error (SV)
Description:Abnormality was detected in the communication between microcomputer SYS CPU (MA-
Detection conditions:
Subcode:
Possible cause:
Protection operation:
2x 97
(ERROR 97) SV NV-RAM defective
Description:Abnormality was detected in the NV-RAM (MS-54 board) in a servo system.
Detection conditions:
Subcode:
Possible cause:
Protection operation:
6-172
83 board) in a system control system and SV CPU (MA-83 board) in a servo system or
between SV CPU and microcomputer EQ CPU (EQ-66 board) in a servo system.
1) When the communication check between SYS CPU and SV CPU fails during normal
operation
2) When the SV CPU initialization is not completed during activation
3) When the communication check between SV CPU and EQ CPU fails during normal
operation
02: When the system error occurs due to No.1 in detection conditions
04: When the system error occurs due to No.2 in detection conditions
08: When the system error occurs due to No.3 in detection conditions
. SV CPU trouble
. EQ CPU trouble
. Signal line disconnection between SV or EQ and SYS CPU
. Trouble of 2-port RAM (MA-83 board) with SYS and SV used in common
Enters the protection mode.
When the checksum of NV-RAM data does not coincide during activation
None (Displays 00.)
. NV-RAMs trouble
. Signal line disconnection between MS-54 board and NV-RAM
Enters the protection mode only when the checksum does not coincide, respectively. (When
the other coincides even if one of them does not coincide, the system functions normally.
In this case, the protection operation is not performed.)
GY-2120WD/WS