6.2 Modbus Communications
226 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Table 6.10 Modbus Communications Command Data
Register No.
(Hex.)
Description
0000 Reserved
0001
Run command, multi-function input command
bit 0
When H5-12 = 0, Forward run/stop
1: Forward run, 0: Stop
When H5-12 = 1, run/stop
1: Run, 0: Stop
bit 1
When H5-12 = 0, Reverse run/stop
1: Reverse run, 0: Stop
When H5-12 = 1, Forward/Reverse run
1: Reverse, 0: Forward run
bit 2
External Fault
1: EF0 [Option Card External Fault]
bit 3
Fault Reset
1: Reset command
bit 4
Multi-function input 1
When H1-01 = 1 [Forward Run], the multi-function input command is “ComRef.”
Note:
When you switch the bit ON as ComRef, the frequency reference source changes to Modbus communications. When you
connect a communication option to the drive, the frequency reference source gives priority to the communications option.
bit 5
Multi-function input 2
When the multi-function input command is H1-02 = 2 [Reverse Run], bit 5 is “ComCtrl.”
Note:
When you switch the bit ON as ComCtrl, the Run Command source changes to Modbus communications. When you
connect a communication option to the drive, the Run Command source gives priority to the communications option.
bit 6
Multi-function input 3
bit 7 Multi-function input 4
bit 8 Multi-function input 5
bit 9 Multi-function input 6
bit A Multi-function input 7
bit B Multi-function input 8
bit C - F Reserved
0002 Frequency Reference o1-03 [FrqDisplay Unit Selection] (unsigned) sets the units.
0003 Output voltage gain
Units: 0.1 %
Setting range: 20 (2.0%) to 2000 (200.0%), the default value at energize: 1000 (100.0%)
0004 Torque reference/torque limit (0.1% signed)
0005 Torque compensation (0.1% signed)
0006 PID setpoint (0.01% signed)
0007 Setting for the multi-function analog monitor output terminal 1 (10 V/4000 H)
0008 Setting for the multi-function analog monitor output terminal 2 (10 V/4000 H)
0009
MFDO setting
bit 0
MFDO (terminal 2NO-2CM)
1: ON, 0: OFF
bit 1
MFDO (terminal 3NO-3CM)
1: ON, 0: OFF
bit 2
MFDO (terminal 4NO-4CM)
1: ON, 0: OFF
bit 3 - 5 Reserved
bit 6 1: bit 7 function is enabled
bit 7
Fault relay output (terminal 1NO/1NC-1CM)
1: ON, 0: OFF
bit 8 - F Reserved
000A Pulse train output (Units: 1/1 Hz, setting range: 0 to 32000)
000B - 000E Reserved