Siemens SIPROCESS GA700 User Manual

Appendix
A.5 MODBUS TCP
Operating with the Local User Interface
286 Operating Manual, 06/2017, A5E31930478-05
Status byte
A status byte is additionally transmitted in synchronism with each measured value. This byte
provides information on the quality of the value in the form of a "Status code". The status
byte has the following structure:
Table A- 8 Coding of status byte/structure
Quality
Substatus
Limits
Structure
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Status
0
0
bad
0
1
uncertain
1 0 good
0
0
ok
0
1
low limited
1
0
high limited
1
1
high and low limited
1)
1)
With limit violations within one band
Coding of the status byte for the measured value output
Table A- 9 Measured value status "Good" (MODBUS TCP)
Quality byte
Dec
Hex
Cause
Effect/remedy
7
6
5
4
3
2
1
0
1
0
0
0
1
1
0
1
141
0x8d
The measured value is valid, but is below an alarm limit.
-
1
0
0
0
1
1
1
0
142
0x8e
The measured value is valid, but is above an alarm limit.
-
1 0 0 0 1 1 1 1 143 0x8f The measured value is valid, but is within an invalid alarm
limit band.
-
1
0
0
0
1
0
0
1
137
0x89
The measured value is valid, but is below a warning limit.
-
1
0
0
0
1
0
1
0
138
0x8a
The measured value is valid, but is above a warning limit.
-
1 0 0 0 1 0 1 1 139 0x8b The measured value is valid, but is within a warning limit
band.
-
1 0 1 1 1 1 0 0 188 0xbc The measured value is valid, but the function check is ac-
tive.
For example, measuring mode is active and a user is logged
on.
-
1 0 1 0 1 0 0 0 168 0xa8 The measured value is valid, but a maintenance demanded
is signaled.
-
1 0 1 0 0 1 0 0 164 0xa4 The measured value is valid, but a maintenance demanded
is signaled.
-
1
0
0
0
0
0
0
0
128
0x80
The measurement is valid (normal measuring mode).
-

Siemens SIPROCESS GA700 Specifications

General

Brand	Siemens
Model	SIPROCESS GA700
Category	Measuring Instruments
Language	English