Emerson PACMotion VFD Series User Manual page 79

Table 45: Modbus Control & Monitoring Registers
Register Upper Lower
Number Byte Byte
400001 Command Control
Word
400002 Command Speed
Reference
400003 Command Torque
Reference
400004 Command Ramp
times
300006 Error Drive
code status
300007 Output Frequency
300008 Output Current
300009 Output Torque
300010 Output Power
300011 Digital Input Status R
300020 Analog 1 Level
300021 Analog 2 Level
300022 Pre Ramp Speed Ref R
300023 DC bus voltages
300024 Drive temperature
Modbus Parameter Access
All User Adjustable parameters (Groups 1 to 5) are accessible by Modbus, except those that would directly
affect the Modbus communications, e.g.
• P5-01 Drive Fieldbus Address – see also P5-16 Drive Modbus Address.
• P5-03 Modbus RTU Baud Rate.
• P5-04 Modbus RTU Data Format.
All parameter values can be read from the drive and written to, depending on the operating mode of the
drive – some parameters cannot be changed whilst the drive is enabled for example.
When accessing a drive parameter via Modbus, the Register number for the parameter is the same as the
parameter number, e.g. Parameter P1-01 = Modbus Register 101.
Modbus RTU supports sixteen bit integer values, hence where a decimal point is used in the drive parameter,
the register value will be multiplied by a factor of ten, e.g. Read Value of P1-01 = 500, therefore this is 50.0 Hz.
For further details on communicating with PACMotion VFDs using Modbus RTU, please refer to your local
Emerson Sales Partner.
GFK-3111A
Read Notes
Write
R/W Command control word used to control the PACMotion VFD when operating
with Modbus RTU. The Control Word bit functions are as follows:
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 any active faults or trips on the drive.
This bit must be reset to zero once the fault has been cleared.
Bit 3 : Coast stop request. Set to 1 to issue a coast stop command.
R/W Setpoint must be sent to the drive in Hz to one decimal place, e.g. 500 = 50.0 Hz.
R/W Setpoint must be sent to the drive in % to one decimal place, e.g. 2000 =
200.0%.
R/W This register specifies the drive acceleration and deceleration ramp times used
when Fieldbus Ramp Control is selected (P5-08 = 1) irrespective of the setting
of P1-12. The input data range is from 0 to 60000 (0.00s to 600.00 s).
R This register contains 2 bytes.
The Lower Byte contains an 8 bit drive status word as follows:
Bit 0 : 0 = Drive Disabled (Stopped), 1 = Drive Enabled (Running).
Bit 1 : 0 = Drive Healthy, 1 = Drive Tripped.
Bit 2 : No Function.
Bit 3 : 0 = Drive Ready (STO Input Closed), 1 = Drive Inhibit (STO Input Open).
Bit 4 : Maintenance Time Not Reached, 1 = Maintenance Time Reached.
Bit 5 : 0 = Not In Standby (Sleep), 1 = Standby (Sleep) mode active.
Bit 6 : 0 = Drive Not Ready, 1 = Drive Ready (Mains Power applied, No Inhibit,
No Trip, Enable Input Present).
Bit 7 : No Function.
The Upper Byte will contain the relevant fault number in the event of a drive
trip. Refer to section Fault Messages on page 90 for a list of fault codes and
diagnostic information.
R Output frequency of the drive to one decimal place, e.g.123 = 12.3 Hz.
R Output current of the drive to one decimal place, e.g.105 = 10.5 Amps.
R Motor output torque level to one decimal place, e.g. 474 = 47.4 %.
R Output power of the drive to two decimal places, e.g.1100 = 11.00 kW.
Represents the status of the drive inputs where Bit 0 = Digital Input 1 etc.
Analog Input 1 Applied Signal level in % to one decimal place, e.g. 1000 = 100.0%.
R
R Analog Input 2 Applied Signal level in % to one decimal place, e.g. 1000 = 100.0%.
Internal drive frequency setpoint.
R Measured DC Bus Voltage in Volts.
R Measured Heatsink Temperature in °C.
PACMotion VFD AC Variable Speed Drive User Guide 79