E-4 RS485/MODBUS Protocol
MN762
E.7.1 Register Descriptions
Read and write registers
Register 1: Drive command
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
High Byte
Low Byte
Bit 0: Run/Stop command: Set to 1 to enable the drive. Set to 0 to stop the drive.
Bit 1: Fast stop request. Set to 1 to enable drive to stop with 2nd deceleration ramp.
Bit 2: Reset request. Set to 1 in order to reset the drive if drive is under trip condition.
User must clear this bit when drive is under normal condition to prevent unexpected reset.
Bit 3: Coast stop request. Set to 1 to issue a coast stop command. For normal operation, Bit 3 has the highest priority, Bit
0 has the lowest priority\ (bit 3>bit 1>bit 0).
Example:
If user set command as 0x0009, drive will do a coast stop rather than run. For normal run/start, set register to
1. Note that start/stop (bit 0), fast stop (bit 1) and coast stop (bit 3) only works if P-28 [Restart Mode] = 0 or 1. Otherwise,
start/stop function is controlled by drive control terminals. Reset function (bit 2) works all the times long as drive is operated
under Modbus control mode (P-07 [Control Source Select] = 3 or 4).
Register 2:
Speed reference setup
This register holds the speed reference value. The input data is 16bits integer and includes one decimal place. For example,
value 500 represents 50.0Hz, value 123 gives 12.3Hz. To get negative speed reference, user needs put negative value into
this register. For example, -1(0xFFFF) gives -0.1Hz. -234(0xFF16) gives -23.4Hz. The input value range from -5000 (0 for
single phase output drive) to +5000, however the drive output speed will be limited by the maximum speed set by P-06.
Register 4:
Modbus ramp control time
This register specifies the drive acceleration and deceleration ramp time. User can only write to this register when P-07 is set
to 4. The input data range is from 0 to 60000 (0.00s to 600.00s).
Read only registers
Register 6:
Drive status and error code
High byte gives drive error code. (Valid when drive tripped, see appendix for details). Low byte gives drive status (0: drive
stopped, 1: drive running, 2: drive tipped).
Register 7:
Motor speed information
This register gives motor speed information. The data is 16bits integer with one decimal place. For example, value 123 gives
12.3Hz. Value -234 (0xFF16) gives -23.4Hz.
Register 8:
Motor current
This register gives motor current information. The data is 16bits integer with one decimal place. For example, 156 = 15.6A,
12 = 1.2A.
Register 11
: Digital input status
The value in this register represents the drive terminal digital input status (Digital input 1 to 4). Lowest bit indicates digital
input 1 status.
Register 12:
Rating ID
The value in this parameter includes specific drive ID information, and is not recommended to be used in general application
by the customer.
Register 13:
Power rating
This gives the drive power rating information, value includes two decimal places. The unit of this register depends on the
drive type (KW/HP).
Register 14:
Voltage level.
This register gives the rated input voltage for the drive. 230: 230V 400: 400V 460: 460V
Register 15:
IO software version
This register contains the drive IO software version info. Value includes two decimal places. For example, 100 means version
1.00
Register 16:
Motor control processor software version
This register contains the software version information of the motor control processor. Value includes two decimal places.
For example, 100 means version 1.00.
