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

Foundation Fieldbus CP Option Card Technical Manual
Multiple block – single bit control
6.6.1

DO 1

DO 2

DO 3

DO 4
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 0= close, 1 = open
6 Position Control Enable *
Single block – multiple bit control.
6.6.2
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
DO 1 0
1
2
3
4
5
6
7
DO 2 0
1
2
3
4
5
6
7
66 of 116
Bit 0 = 'Close'.
Bit 0 = 'Open'.
Bit 0 = 'Stop'.
Bit 0 = selected by mode – see below.
Operation
Close
Open
Stop
ESD
Position control enable
Set relay 1
Set relay 2
Set relay 3
Open
Close
Stop
ESD
Partial stroke
Set relay 1
Set relay 2
Set relay 3
Publication PUB089-005-00_0618
* 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
Fig 6.10: DO4 options as shown in the TB
Note: Mode 6 bit 0 is position control enable.
Read-back
Close limit
Open limit
Actuator not moving
ESD
Position control enabled
relay 1 set
relay 2 set
relay 3 set
Open limit
Close limit
Actuator not moving
ESD
Partial stroking
relay 1 set
relay 2 set
relay 3 set