rotork Mk3 - Multiple Block - Single Bit Control; Single Block - Multiple Bit Control

Foundation Fieldbus CP Option Card Technical Manual
66 of 116 Publication PUB089-005-00_0618
Fig 6.10: DO4 options as shown in the TB
Note: Mode 6 bit 0 is position control enable.
6.6.1 Multiple block – single bit control
 DO 1 Bit 0 = ‘Close’.
 DO 2 Bit 0 = ‘Open’.
 DO 3 Bit 0 = ‘Stop’.
 DO 4 Bit 0 = selected by mode – see below.
* Note:
1. Mode 0 and mode 6 offer the same
control in single bit support. When used in
multistate support, mode 6 provides both
position control enable and PST options in
the same block.
2. The DO4 block options will appear as
shown in fig 6.10
6.6.2 Single block – multiple bit control.
The table below identifies the function of each bit in the available DO block when multiple bit control is
selected. PV_D comes from READBACK from the appropriate ‘status inputs’. The bold text in the
read-back column below indicates bits that only echo the command operation. The italic text in the
operation and read-back column show the function of the block for the multiple block mode described
previously.
Block
Bit
Operation
Read-back
DO 1
0
1
2
3
4
5
6
7
Close
Open
Stop
ESD
Position control enable
Set relay 1
Set relay 2
Set relay 3
Close limit
Open limit
Actuator not moving
ESD
Position control enabled
relay 1 set
relay 2 set
relay 3 set
DO 2
0
1
2
3
4
5
6
7
Open
Close
Stop
ESD
Partial stroke
Set relay 1
Set relay 2
Set relay 3
Open limit
Close limit
Actuator not moving
ESD
Partial stroking
relay 1 set
relay 2 set
relay 3 set
Mode
Bit 0 Function
0
Position Control Enable *
1
ESD
2
Set/reset relay 1
3
Partial Stroke *
4
Not Applicable (AO only control)
5
6
0= close, 1 = open
Position Control Enable *