4742-E P-26
SECTION 1 INVERTER UNIT (MIV UNIT)
21
Servo link
communica-
tion error
A communication error occurred with the servo link and com-
mands from the NC cannot be received.
XXXXYYYY
XXXX = 0 (fixed)
YYYY = Bits indicate the details of communication error.
(Servo link error status at the detection of error)
bit 15 = 1: Second B buffer error
bit 14 = 1: Second A buffer error
bit 13 = 1: First B buffer error
bit 12 = 1: First A buffer error
bit 11 = 1: MT buffer error
bit 10 = 1: Relay processing error
bit 9 = 1: Receive interface section data number error
bit 8 = 1: Wire breakage error
bit 7 = 1: Address pointer error
bit 6 = 1: Modulation code error
bit 5 = 1: CRC error
bit 4 = 1: Format error
bit 3 = 1: Double send error
bit 2 = 1: Double receive error
bit 1 = 1: Parity error
bit 0 = 1: Time-out error
Change the servo
link cable.
Change the MIV unit.
Change the FCP
board.
22
Servo link
cable
breakage
The servo link cable was broken and commands from the NC
cannot be received.
XXXXYYYY
XXXX = Wire breakage position
0000[Hex]: Immediately upstream the corresponding unit
8000[Hex]: Upstream the corresponding unit
YYYY = Servo link error status at the detection of error
Change the servo
link cable.
Change the MIV unit.
Change the FCP
board.
23
Servo link
protocol error
Format or timing of the data sent from the NC to the inverter
unit is erroneous.
XXXXXXXX
1: A-buffer software synchronization error
2: A-buffer format code error
3: B-buffer software synchronization error
4: B-buffer format code error
5: B-buffer block number error
Check the NC soft-
ware.
Change the MIV unit.
Change the FCP
board.
24
Servo data
error
The servo data sent from the NC during initialization or opera-
tion cannot be processed.
XXXXYYZZ
XXXX = ID number of the error detected data [Hex]
YY = Set number of the error detected data
ZZ = Details of error
1: Outside the setting range
2: Setting timing error
3: Data not transmitted
4: Calculation error
5: Other
Check the servo
data file.
Check the NC soft-
ware.
Change the MIV unit.
No.
Name
Description/Alarm Code
Corrective Action
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