Profibus DP Mk2 Option Card Installation Manual
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Publication PUB088-005-00_1017
5.1.4
The IQ ‘S’ contacts (Profibus DOs) controlled by the O_STAT register
The IQ/IQT actuator has four ‘S’ contact outputs that may be configured to report the status of the
actuator with signals such as Open Limit, Closed Limit etc. These are identified as S1 to S4. In
addition, an optional extra relay indication board can be fitted with four more relays. The status of
these relays is then adjusted by Profibus commands on outputs DO-1 to DO-4 in the O_STAT register.
Writing a ‘1’ in the appropriate location energises the relay and ‘0’ de-energises the relay. Note that
these relays are latching and, if energised, will not change state when the actuator power is removed.
On restoration of power the relays will be reset to their de-energised condition.
O_STAT Register
Bit 4 - 15
Bit 3
Bit 2
Bit 1
Bit 0
Reserved
DO-4
DO-3
DO-2
DO-1
5.1.5
Multiport Position Selection using the PORTCM register (Future)
The multiport actuator position selection requires the Configuration (see section 5.4) to be set to
Configuration 10 and a value to be set into the PORTCM register corresponding to the desired port
number to go to. In addition, during parameterisation the number of ports and number of active ports
must be set.
PORTCM Register
Register value: 1 to 10 (1 to A hex)
Position demand: Port 1 to Port 10
The actuator will move directly to the port selected in the register each time the value is changed. If
the actuator is set to Local and moved by the local controls, when returned to remote the positioning
the PORTCM register will be adopted. The valve can have up to 10 ports and the number of active
ports can be selected. There are two parameters available to make these settings.
5.1.6
Profibus Network Control Disable feature
It is possible to set the IQ/IQT/Skil/EH ESD/DI-4 input so that the actuator ignores open, stop, close,
ESD and position control signals sent over the Profibus network. If the ESD DI-4 / Net Disable
parameter is set to Active, then when the ESD input is connection is made (i.e. 24 volts applied to
ESD), Profibus control is not allowed. This feature is independent of the Auxiliary mask setting. When
the ESD DI-4 / Net Disable parameter is set to active, no ESD will be available.
This feature is not included in a standard Q range actuator.
Fig 31: IQ and IQT relay outputs DO-1 to DO-4
S1 - S4
Actuator
Main
Board
IQ or IQT with Additional Relay Output board fitted
DO-1 to DO-4
Output Board
PFU
