Profibus DP Mk2 Option Card Installation Manual
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Publication PUB088-005-00_1017
7.2.14
ESD Parameters (Parameter 97 - 101)
The ESD signal is used to operate actuators to a pre-determined state, under shutdown conditions.
There are a number of settings that can be made for this operation.
ESD direction (Parameter 97)
This parameter sets the direction of operation in the event of an ESD
signal being applied to the actuator.
Parameter ESD Contact (Parameter 98)
This parameter sets the polarity of the ESD contact, either Normally
Open or Normally Closed.
ESD Bypasses the actuator interlocks (Parameter 99)
This parameter selects whether an ESD will override the interlock
setting on the actuator.
ESD Bypasses the Thermostat trip (Parameter 100)
This parameter selects whether an ESD will continue to operate in the
event of a Thermostat trip.
ESD Bypasses Local Stop (Parameter 101)
This parameter selects whether an active ESD will still operate the
actuator even if it is in Local Stop.
7.2.15
Interlock enable (Parameter 102)
This parameter indicates if the interlocks are enabled or disabled on the actuator.
7.2.16
Open Limit position (Parameter 103)
The DTM decodes this parameter to show the number of turns that the actuator has been set to.
7.2.17
Interrupter Timer parameters (104
– 108)
The interrupter timer enables pulsed ‘start / stop’ operation as a response to local or remote control
commands. This can be used to extend the valve stroke time. There are a number of parameters that
can be set up for this.
Interrupter Timer start limit (Parameter 104)
This parameter sets up the limit around which the interrupter timer will
operate, whether the open or the closed limit.
Interrupter Timer off time (Parameter 105)
This parameter sets up the time that the interrupter timer will stop the
actuator for.
Interrupter Timer on time (Parameter 106)
This parameter sets up the time that the interrupter timer will start and
run the actuator.
