Westlock ICOT 5400, Техническое руководство

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AO (Analog Output) channels
The analog output channels will control physical outputs according to the Transducer block configuration.
Table 10
shows the channels that are available for the AO block:
Table 10: Available channels for the AO blocks
Channel Channel Name Description
0 Uninitialized Default value for AO
1 Position Drives the valve to the specified setpoint
position
Optionally, to enable the BKCAL_OUT parameter to report the actual position, the IO_OPTS parameter
“ PV for BKCal_Out” must be set to ‘1’. Notice the AO block mode must be OOS before modifying
IO_OPTS. In this way, the BKCAL_OUT will publish the position feedback according to the READBACK
parameter.
When using the ICoT, the Analog Output units of measure must be % (of full span valve position).
See a configuration example of AO scaling as shown in Table 11 .
Table 11: AO Scaling
Process Value Scale (PV_SCALE) Transducer Scale (XD_SCALE)
EU at 100% (EU_100) = 100 EU at 100% (EU_100) = 100
EU at 0% (EU_0) = 0 EU at 0% (EU_0) = 0
Units Index (UNITS_INDEX) = % Units Index (UNITS_INDEX) = %
Decimal (DECIMAL) = 3 Decimal (DECIMAL) = 3
The parameter SHED_OPT (that defines action to be taken on remote control device timeout) must also
be configured, for instance, to the option “NormalShed_NormalReturn”.
See Section 11.4.5 for the complete list of the Analog Output function block parameters, including default
values.