Command #137: Read Auto Zero Comp Value; Command #139: Read Sensor Status Message; Command #140: Read Swap Delay Status - MSA Ultima X Series Installation & Maintenance Instructions Manual

Command #137: Read Auto Zero Comp Value

Returns the Ultima Automatic Zero Compensation value. This value is
accumulated by the device when the sensor reading attempts to drift
below zero. This value is used to compensate the actual Zero
calibration. The device will attempt to compensate up to 10 counts
(display units) before setting the under-range bit.

Command #139: Read Sensor Status message

Returns the Ultima X sensor status message. This is a single byte
containing hex codes. This byte is sent from the sensor module to the
main processor and passed to the HART communications processor.
Request Data Bytes
BYTE FORMAT
None
Response Data Bytes
BYTE FORMAT
0 Enum

Command #140: Read Swap Delay Status

This command returns the Ultima X sensor swap delay status. This is a
single byte containing a 0 if disabled or 1 if enabled. If enabled, the
swap delay will hold off a sensor missing error for 1 minute. This hold-
off allows a sensor module to be swapped out with a calibrated sensor
module without triggering a "sensor missing" alarm and dropping the 4-
20 mA to the trouble level.
Request Data Bytes
BYTE FORMAT
None
Response Data Bytes
BYTE FORMAT
0 Enum
DESCRIPTION
DESCRIPTION
Sensor Status message (See TABLE D-12)
DESCRIPTION
DESCRIPTION
Sensor Swap Delay Status (0 –disabled, 1 - enabled)
D-11