Siemens Milltronics BW500, Operating Instructions Manual

Page: 145 / 220

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.