Write Single Register | Schneider Electric Altivar 212 instruction

Modbus services

Write Single Register (6)

The Write Single Register function permits to write value of one parameter. Not all Altivar 212 parameters can be written.

Request and response:

Slave no.	Function code	Register address			Register value			CRC16
	06	Hi		Lo	Hi		Lo	Lo		Hi

1 byte	1 byte		2 bytes			2 bytes		2 bytes

Error response:

Slave no.	86	Exception code	CRC16
			Lo	Hi

1 byte	1 byte	1 byte	1 byte

Example: Write value 60 Hz to the parameter [Frequency reference from serial comm.] (FA01) in Altivar 212 slave 1.

Request and response:

01

06

FA01

1770

E6C6

Example: Error response due to invalid register address.

Request:

01

06

FFFF

0000

89EE

Error response:

01

86

02

C3A1

36	S1A53844 01/2011

Image 36

Schneider Electric Altivar 212 manual Write Single Register

Contents

Altivar S1A53844 01/2011 Table of Contents Table of Contents Safety Information Important Information About the Book At a Glance Hazard of Electric SHOCK, Explosion or ARC Flash S1A53844 01/2011 Introduction Introduction Hardware setup Whats in this Chapter?Topic Pin out of the Open Style Modbus connector RJ45Cross section Tightening torque Connection via Open Style wiring system Pin out of the RJ45 Modbus connectorPin Signal Open Style Reference Connection via RJ45 wiring system Connection accessoriesConnecting cables RJ45 Reference Protection Against Interference Description of terminals PTC resistor value F646 GND Hardware setup Configuration Configuration of the communication parameters Access to the parametersParameters Modbus Adjustment range Default Valid Address After Configuration of the control source Parameters Modbus SettingControl by the Modbus network Communication Setting Default Valid Control by the terminals, monitoring by the Modbus networkParameters Parameters Modbus Setting Default Valid Parameters Modbus Setting Default Valid Address Com channel choice F807 Communication Menu COM submenuLI R selection F112 LI R selection Parameters Location Remote spd ref 2 F207Frequency source VIA VIA Complete control diagram Commands CMOd Configuration of the indirect blocks Configuration Configuration of the communication interruption Configure the drive behaviour Parameter Modbus Setting Default Valid AddressCommunication detected fault 16#851 2129 Configuration Modbus services RTU mode Principle of the Modbus protocolSlave Slave j Slave k Slave address Function code Data Modbus functions available Read one wordFunction 3, quantity = Read indirect block Function 3, quantity = 1Status info Read indirect block of 2 parameters Write Single Register Write multiple registers Function 16 = 16#10, quantity =1 Command word Frequency Setpoint Write indirect blockSpeed Setpoint Request 6C 7E Response Read Device Identification 43/14 Error response Exception code Modbus services Parameter list Auto ramp AUI Disabled Manual Setting of Max frequency FHReferring to the Altivar 212 programming manual General Commands from serial communication List of control parametersSetpoints from serial communication Outputs control from serial communication List of monitoring parameters StatusFrequency and speed Current and torque Power and energy MaintenanceTrip and alarm codes Values Commands Command word FA00Bit Specifications Remarks Command word 2 FA20 Energy reset bitExamples Over-current stall level change bit Setpoints Frequency setpoint FA01Speed setpoint FA13 Status Status word FE0I Fd01 Command mode status FE45 Setpoint mode status FE46Status word 2 FE42 Fd42 Status word 3 FE49 Fd49 Trip and alarm codes Alarm code FC91Alarm of run time FE79 Code Value Description Hexadecimal number Decimal number Monitoring and control of I/O from communication Digital inputs status Fd06, FE06Digital outputs status Fd07, FE07 Bit Terminal name Function parameter title Digital outputs command FA50 Analog outputs command FA51Damper opening command Analog inputs values FE35, FE36 F580 = 3 Model Voltage Power Rating Code FB05 Class FB72bit8 IdentificationDrive model code F805 ATV212WU15N4C S1A53844 01/2011 Appendix Modbus 2-wire standard schematic Schematic diagramRS485 standard Migration Migration ATV21 ATV212 For exampleCommissioning ATV212Modbus manualENS1A5384401 S1A53844 01/2011