Spectrum Controls 1769sc-HART Modules - Manual (Page 58)

Compact IO™ Isolated HART Analog Output Module
User’s Manual 0300217-03 Rev. A
6-6
the module applies the program/idle mode data value. The default setting is disabled.
Note: Not all controllers support this function. Refer to your controller’s user manual
for more details.
HI (Hold for Initialization)
Hold for Initialization causes outputs to hold their present state until the value
commanded by the controller matches the value or is within a percentage of the value
being commanded by the module. The value being commanded by the module is
reflected in the Input file words 2 through 5; the channel data value words for channels 0
through 3 respectively.
If Hold for Initialization is selected, outputs will hold if any of the three conditions occur:
 Initial connection is established after power-up
 Communications re-established after a communications fault
 There is a transition from Program mode to run mode.
PM (Program Mode)
This parameter determines whether the output channel will hold the last state of the
output signal or go to a user defined value during a transition from running mode to
program mode.
Note: The user defined value is defined by configuration words 3, 11, 19, and 27 for
channels 0 through 3 respectively.
FM (Fault Mode)
This parameter determines whether the output channel will hold the last state of the
output signal or go to a user defined value during a transition from running mode to fault
mode.
Note: The user defined value is defined by configuration words 2, 10, 18, and 26 for
channels 0 through 3 respectively.
ER (Enable Ramping)
When enabled, the analog signal for the associated channel will increment and decrement
at predefined rate whenever the channel data value changes.
LA (Latch Alarm)
The latch alarm feature enables process alarms (i.e. Over Range, Under Range, Clamp
High, etc.) to be latched during an alarm condition.
Note: A specific bit in the output image file must be set to clear the associated alarm
latch condition. See Section 6.4 Output Data File.
SIO (System Interrupt High Clamp, Over Range Alarm)
When the SIO feature is enabled, a high clamp or over range alarm will trigger a
system interrupt within the PLC. This feature allows an immediate response from
the system when an analog output channel is commanded to exceed the user
defined clamp limit.
SIU (System Interrupt Low Clamp, Under Range Alarm)
When the SIU feature is enabled, a low clamp or under range alarm will trigger a
system interrupt within the PLC. This feature allows an immediate response from
the system when an analog output channel is commanded to exceed the user
defined clamp limit.