General data of the Modbus RTU interface
32 devices in each segment without repeater, with repeaters expandable to 247
Number of devices
Polling between master and slaves (query response)
Fieldbus access
01 Read Coil Status
02 Read Input Status
03 Read Holding Registers
04 Read Input Registers
05 Force Single Coil
15 (0FHex) Force Multiple Coils
06 Preset Single Register
16 (10Hex) Preset Multiple Registers
17 (11Hex) Report Slave ID
08 Diagnostics:
●
00 00 Loopback
●
00 10 (0AHex) Clear Counters and Diagnostic Register
●
00 11 (0BHex) Return Bus Message Count
●
00 12 (0CHex) Return Bus Communication Error Count
●
00 13 (0DHex) Return Bus Exception Error Count
●
00 14 (0EHex) Return Slave Message Count
●
00 15 (0FHex) Return Slave No Response Count
●
00 16 (10Hex) Return Slave NAK Count
●
00 17 (11Hex) Return Slave Busy Count
●
00 18 (12Hex) Return Character Overrun Count
Supported Modbus functions (ser-
vices)
Commands and signals of the Modbus RTU interface
OPEN, STOP, CLOSE, position setpoint, RESET, EMERGENCY operation command, enable LOCAL,
Interlock OPEN/CLOSE
Process representation output
(command signals)
●
End positions OPEN, CLOSED
●
Actual position value
●
Actual torque value, requires MWG in actuator
●
Selector switch in position LOCAL/REMOTE
●
Running indication (directional)
●
Torque switches OPEN, CLOSED
●
Limit switches OPEN, CLOSED
●
Manual operation by handwheel or via local controls
●
SIL function active (must not be used in SIS)
Process representation input (feed-
back signals)
●
Motor protection tripped
●
Torque switch tripped in mid-travel
●
One phase missing
Process representation input (fault
signals)
The behaviour of the actuator is programmable:
●
Stop in current position
●
Travel to end position OPEN or CLOSED
●
Travel to any intermediate position
●
Execute last received operation command
Behaviour on loss of communication
Service conditions
Indoor and outdoor use permissible
Use
Any position
Mounting position
≤
2 000 m above sea level
> 2,000 m above sea level on request
Installation altitude
Refer to name plate of actuator controls
Ambient temperature
Up to 100 % relative humidity across the entire permissible temperature range
Humidity
94
SAVEx 07.2 – SAVEx 16.2 / SARVEx 07.2 – SARVEx 16.2 Control unit: electronic (MWG)
Technical data
ACVExC 01.2 Non-Intrusive Modbus RTU
