Siemens Milltronics BW500/L - Page 145

Communications
11.5 Modbus RTU/ASCII Protocol
BW500 and BW500/L
Operating Instructions, 12/2016, A5E33482052-AD
143
Command Controls (41,022)
The command control word is used to control the unit. Each bit gives access to a command or
state as if the operator was using the keypad.
Bits initiating a command (7-12) must change state to cause the command the begin. For
example, to reset totalizer 1, Bit 9 must be set to 0, then changed to 1. It can stay set or clear for
any period:
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 change
Start
8
Span
No change
Start
9
Reset Totalizer 1
No change
Reset
10
Reset Totalizer 2
No change
Reset
11
Reset Batch Totalizer
a)
No change
Reset
12
Print
-
Print
13
-
-
-
14
-
-
-
15
-
-
-
16
-
-
-
a)
Not available with BW500/L.
WARNING
Before the BW500 and BW500/L can be commanded remotely, parameter P799 must be
set for remote control.