GE AF-70 LP - 8 Modbus RTU Communications; Introduction; Modbus RTU Specification; RJ45 Connector Configuration

AF-7
AF-70 LP
8
26

25
8. ModbusRTUCommunications
8.1. Introduction
TheAF-70canbeconnectedtoaModbusRTUnetworkviatheRJ45connectoronthefrontofthedrive.
8.2. ModbusRTUSpecification
Protocol
ModbusRTU
Errorcheck
CRC
Baudrate
9600bps,19200bps,38400bps,57600bps,115200bps(default)
Dataformat
1startbit,8databits,1stopbits,noparity.
Physicalsignal
RS485(2-wire)
Userinterface
RJ45
SupportedFunctionCodes
03ReadMultipleHoldingRegisters
06WriteSingleHoldingRegister
16WriteMultipleHoldingRegisters(Supportedforregisters1–4only)
8.3. RJ45ConnectorConfiguration
ForfullMODBUSRTUregistermap
informationpleaserefertoyourGESales
Partner.Localcontactscanbefoundby
visitingourwebsite
www.geindustrial.com/Drives

WhenusingMODBUScontroltheAnalogand
DigitalInputs
canbeconfiguredasshowninsection7.5

1
CAN-
2
CAN+
3
0Volts
4
-RS485(PC)
5
+RS485(PC)
6
+24Volt
7
-RS485(ModbusRTU)
8
+RS485(ModbusRTU)







Warning:
ThisisnotanEthernet
connection.Donotconnect
directlytoanEthernetport.


8.4. ModbusRegisterMap
Register
Number
Par.
Type
Supported
Function
Codes
Function
Range Explanation
03
06
16
LowByte
HighByte
1
-
R/W
"
"
"
DriveControlCommand
0..3
16BitWord.
Bit0:Low=Stop,High=RunEnable
Bit1:Low=DecelRamp1(F-04),High=Decel
Ramp2(H-24)
Bit2:Low=NoFunction,High=FaultReset
Bit3:Low–NoFunction,High=CoastStop
Request
2
-
R/W
"
"
"
ModbusSpeedreferencesetpoint
0..5000
Setpointfrequencyx10,e.g.100=10.0Hz
4
-
R/W
"
"
"
AccelerationandDecelerationTime
0..60000
Ramptimeinsecondsx100,e.g.250=2.5seconds
6
-
R
"


Errorcode
Drivestatus

LowByte=DriveErrorCode,seesection10.1
HighByte=DriveStatusasfollows:-
0:DriveStopped
1:DriveRunning
2:DriveTripped
7

R
"


OutputMotorFrequency
0..20000
OutputfrequencyinHzx10,e.g.100=10.0Hz
8

R
"


OutputMotorCurrent
0..480
OutputMotorCurrentinAmpsx10,e.g.10=1.0Amps
11
-
R
"


Digitalinputstatus
0..15
Indicatesthestatusofthe4digitalinputs
LowestBit=1Input1
20
DR-01
R
"


AnalogInput1value
0..1000
Analoginput%offullscalex10,e.g.1000=100%
21
DR-02
R
"


AnalogInput2value
0..1000
Analoginput%offullscalex10,e.g.1000=100%
22
DR-03
R
"


SpeedReferenceValue
0..1000
Displaysthesetpointfrequencyx10,e.g.100=10.0Hz
23
DR-08
R
"


DCbusvoltage
0..1000
DCBusVoltageinVolts
24
DR-09
R
"


Drivetemperature
0..100
DriveheatsinktemperatureinºC
AlluserconfigurableparametersareaccessibleasHoldingRegisters,andcanbeReadfromorWrittentousingtheappropriateModbus
command.TheRegisternumberforeachparameterF-04toH-60isdefinedas128+Parameternumber,e.g.forparameterH-15,theregister
numberis128+15=143.Internalscalingisusedonsomeparameters,forfurtherdetailspleasecontactyourGESalesPartner.

 