2-15
DNW-A220
DNW-A220P
ERROR-99 INTERNAL INTERFACE ERROR 2
(INTERNAL I/F 2)
Description: Abnormality was detected in the communication between SYS2 CPU (IC108 on
SY-260 board) and SERVO CPU (SV-194 board) or MPU (on EQ-72, DM-114/
114P, or SDI-23 board).
Sub error messages and Detecting conditions:
SV: When the SERVO CPU (IC401 on SV-194 board) initialization at turn on
the power is in abnormal state.
EQ: When the communication with EQ-72 board’s MPU (IC708) is in abnor-
mal state.
DM: When the communication with DM-114/114P board’s MPU (IC908) is in
abnormal state.
TBC: When the communication with DM-114/114P board’s MPU (IC1808) is
in abnormal state.
SDI: When the communication with SDI-23 board’s MPU (IC455) is in
abnormal state.
Possible causes: SV: . DIP switch (S100 on SV-194 board) setting defect
. Common RAM (IC300 on SV-194 board) trouble
. Servo system (on SV-194 board) trouble
EQ: . MPU control interface circuit (IC402, 459 and 460 on SY-260 board)
trouble
. Interface buffers (IC702 and 704 on EQ-72 board) trouble
. EQ-72 board’s MPU (IC708) trouble
DM: . MPU control interface circuit (IC402, 459 and 460 on SY-260 board)
trouble
. DM-114/114P board’s MPU (IC908) trouble
TBC: . MPU control interface circuit (IC402, 459 and 460 on SY-260 board)
trouble
. DM-114/114P board’s MPU (IC1808) trouble
SDI: . MPU control interface circuit (IC402, 459 and 460 on SY-260 board)
trouble
. SDI-23 board’s MPU (IC455) trouble
Protecting operations: When the sub error message is “SV”, enters the protection mode.
When it is except above, displays only this error.
2-2. Details of Error Messages
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