C.5 MEMOBUS/Modbus Setup Parameters
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 387
MEMOBUS/Modbus
Communications
C
■ H5-05: Communication Fault Detection Selection
Enables or disabled the communication error (CE) detection for MEMOBUS/Modbus communications.
Setting 0: Disabled
No error detection. The drive continues operation.
Setting 1: Enabled
If the drive does not receive data from the master for longer than the time set to H5-09, then a CE fault will be triggered
and the drive will operate as determined by parameter H5-04.
■
H5-06: Drive Transmit Wait Time
Sets the time the drive waits after receiving data from a master until responding data.
Figure C.6
Figure C.6 Drive Transmit Wait Time Setting
■ H5-07: RTS Control Selection
Enables or disables RTS control.
Setting 0: Disabled - RTS is Always ON
Use this setting when using RS-485 signals for communications (1:1).
Setting 1: Enabled - RTS Turns ON when Sending
Use this setting when using RS-422 signals for communications (1:N).
■
H5-09: CE Detection Time
Sets the time the communications must be lost before the drive triggers a CE fault.
■
H5-10: Unit Selection for MEMOBUS/Modbus Register 0025H
Sets the unit for the output voltage monitor value in MEMOBUS/Modbus register 0025H.
Setting 0: 0.1 V Units
Setting 1: 1 V Units
No. Name Setting Range Default
H5-05 Communication Fault Detection Selection 0 or 1 1
No. Name Setting Range Default
H5-06 Drive Transmit Wait Time 5 to 65 ms 5 ms
No. Name Setting Range Default
H5-07 RTS Control Selection 0 or 1 1
No. Name Setting Range Default
H5-09 CE Detection Time 0.0 to 10.0 s 2.0 s
No. Name Setting Range Default
H5-10 Unit Selection for MEMOBUS/Modbus Register 0025H 0 or 1 0
Command message Response message Command message
PLC→Drive PLC→DriveDrive→PLC
Time
24 bit length
H5-06 setting
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