Spu Status Request (Item Qs) - Honeywell 854 ATG Series Instruction Manual

6.4 SPU status request (item QS)

The servo status request (item QS) consists of four bytes. Bytes 0, 1 and 2 are bit coded with information
about the level alarms, operational mode and general status. Byte 3 is an ASCII character that indicates the
active operational command.
Status byte 0:
bit 0 : low level alarm
1 : low low level alarm
2 : high level alarm
3 : high high level alarm
4 : motor limit switch low
5 : motor limit switch high
6 : 1
7 : 0
Status byte 2:
bit 0 : Active interface bit 0
1 : Active interface bit 1
2 : dipped level
3 : 0
4 : general fail indication
5 : no previous ST, WD or SD command
6 : 1
7 : 0
Status byte 3:
- : no command active
A : balance test
B : Block
C : calibrate
D : go down
F : freeze
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Status byte 1:
bit 0 : displacer movement down
1 : displacer movement up
2 : on level
3 : test flag
4 : calibration test successful
5 : calibration test failed
6 : 1
7 : 0
Active interface:
bit 1 bit 0 Mode
0 0
0 1
1 0
1 1
N : interface profile
L : lock test
M : measure frequency
R : tank profile
T : test gauge
U : go up
Trouble shooting
I1
I2
I3
dip