Siemens Milltronics BW500/L - Page 144

Communications
11.5 Modbus RTU/ASCII Protocol
BW500 and BW500/L
142 Operating Instructions, 12/2016, A5E33482052-AD
Device State (41,020 – 41,020)
The Device State word is used to feed back the current operating state of the product. Each bit
gives the state of different parts of the product, some mutually exclusive, others are not. The
state should be checked to verify any device commands.
Bit #
Description
Bit Clear
Bit Set (1)
1
PID 1 Mode
a)
Manual
Auto
2
PID 1 Freeze
a)
No
Yes
3
PID 1 Setpoint Source
a)
Local
Remote
4
PID 2 Mode
a)
Manual
Auto
5 PID 2 Freeze
a)
No Yes
6
PID 2 Setpoint Source
a)
Local
Remote
7
Zero
No
In progress
8
Span
No
In progress
9
-
-
-
10
-
-
-
11
-
-
-
12
-
-
-
13
Write Privileges
No
Yes
14
System Configured
Not Configured
Yes
15
Mode
Calibration Mode
RUN Mode
16
Totalizing
Not Totalizing
Totalizing
a)
Not available with BW500/L.