rotork Profibus Modbus Module Mk2, Installation Manual

Page: 34 / 84

Profibus DP Mk2 Option Card Installation Manual
34 of 84 Publication PUB088-005-00_1017
5.1 Control Outputs
The Profibus DP Module (Mk2) can be used to control the actuator and position the valve. The valve
may be moved fully closed, fully open or to an intermediate position. Additionally, the actuator can
make the valve adopt an Emergency Shut Down position. The actuator may also be operated from its
local controls or by hard-wired direct contact inputs (in the case of the IQ and IQT the Auxiliary Input
Mask must be correctly set).
As well as controlling the actuator the PFU can also be used to operate 4 discrete output relays when
fitted to an IQ/IQT actuator with the extra relay indication board fitted.
The control commands have three potential sources:

Profibus DP network generated commands

Actuator Local Controls

Direct contact input controls
The full list of commands is shown in the table. The actuator types show whether the command is
applicable to that actuator type.
Command IQ & IQT CVA Q ROMPAK Skil/EH
Profibus over the network
Open
    
Close
    
Stop
    
Emergency Shut Down
    
Analogue Position Demand
    
Partial Stroke
    
Multiport Position

    
Relay output DO-1


   
Relay output DO-2


   
Relay output DO-3


   
Relay output DO-4


   
Local Actuator Controls
Open
    
Close
    
Stop
    
Direct Hard-Wired Inputs
Open
  




Close
  




Stop/Maintain
  




Emergency Shut Down (Network Disable)
  




Open Interlock (active prevents opening)
    
Close Interlock (active prevents closing)
    
See notes on next page.