Network
Communications
5
5.3 MEMOBUS/Modbus Communications
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 325
Minor
Fault/
Alarm
Code
(Hex.)
Name
000B EF5 [External Fault (Terminal S5)]
000C EF6 [External Fault (Terminal S6)]
000D EF7 [External Fault (Terminal S7)]
000E EF8 [External Fault (Terminal S8)]
000F FAn [Internal Fan Fault]
0010 oS [Overspeed]
0011 dEv [Speed Deviation]
0012 PGo [Encoder (PG) Feedback Loss]
0014 CE [Modbus Communication Error]
0015 bUS [Option Communication Error]
0016 CALL [Serial Comm Transmission Error]
0017 oL1 [Motor Overloaded]
0018 oL2 [Drive Overloaded]
001A EF0 [Option Card External Fault]
001B rUn [Motor Switch during Run]
001D CALL [Serial Comm Transmission Error]
001E UL3 [Undertorque Detection 1]
001F UL4 [Undertorque Detection 2]
0020 SE [Modbus Test Mode Error]
0021 L24v [Loss of External Power 24 Supply]
0022 oH3 [Motor Overheat (PTC Input)]
0027 FbL [PID Feedback Loss]
0028 FbH [Excessive PID Feedback]
002A dnE [Drive Disabled]
002B PGoH [Encoder (PG) Hardware Fault]
Minor
Fault/
Alarm
Code
(Hex.)
Name
0031 E5 [MECHATROLINK Watchdog Timer Err]
0032 AEr [Station Address Setting Error]
0033 CyC [MECHATROLINK CommCycleSettingErr]
0034 HCA [High Current Alarm]
0035 LT-1 [Cooling Fan Maintenance Time]
0036 LT-2 [Capacitor Maintenance Time]
0039 EF1 [External Fault (Terminal S1)]
003A EF2 [External Fault (Terminal S2)]
003B SToF [Safe Torque OFF Hardware]
003C STo [Safe Torque OFF]
003D oL5 [Mechanical Weakening Detection 1]
003E UL5 [Mechanical Weakening Detection 2]
0042 TrPC [IGBT Maintenance Time (90%)]
0043 LT-3 [SoftChargeBypassRelay MainteTime]
0044 LT-4 [IGBT Maintenance Time (50%)]
0045 boL [Braking Transistor Overload]
0049 dWAL [DriveWorksEZ Alarm]
004A dWA2 [DriveWorksEZ Alarm 2]
004B dWA3 [DriveWorksEZ Alarm 3]
0081 EP24v [External Power 24V Supply]
0085 bAT [Keypad Battery Low Voltage]
0087 CP1 [Comparator 1 Limit Error]
0088 CP2 [Comparator 2 Limit Error]
0089 TiM [Keypad Time Not Set]
008A bCE [Bluetooth Communication Error]
◆ Error Codes
■ MEMOBUS/Modbus Communications Error Code List
Table 5.16 lists the MEMOBUS/Modbus communications error codes.
When an error occurs, remove the cause of the error and restart communications.
Table 5.16 MEMOBUS/Modbus Communications Error Codes
Error Code
(Hex.)
Name Cause
01 Function Code Error The PLC set a function code that was not 03, 08, or 10 (Hex.)
02
Register Number
Error
• The register number that is trying to access is not registered.
• A starting number that was not 0001 or 0002 (Hex.) was set when broadcasting.
03 Bit Count Error
• Read and write data quantities are more than the 1 to 16 range. (Command message data
quantity is disabled.)
• The data that was read from non-consecutive holding registers contained more than 120 bytes.
• The data to be written to non-consecutive holding registers contained more than 60 bytes.
• In the write mode, the number of bytes in the message is not the number of data × 2.
21 Data Setting Error
• Writing control data or parameters made the settings go out of the permitted setting range.
• A parameter setting error occurred when writing a parameter.
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