Chapter 3 – Operation
ACS 600 Master/Follower Application Macro 3-3
Follower Control
The master broadcasts a
Control Word
and two references
(Reference
1
and
Reference 2)
to the Follower stations. All the Follower stations
receive the same message.
The Follower
Control Word
The Follower Control Word (Actual signal 3.11 FOLLOWER MCW) is a
packed 16-bit word. The commands in the Control Word are effective
when the Follower Parameter 10.01 EXT1 STRT/STP/DIR or
10.02 EXT2/STRT/STP/DIR (whichever control location is selected) is
set to COMM. MODULE.
Table 3-2 The Follower Control Word.
Reference 1 Reference 1
is a 16-bit word containing a sign bit and a 15-bit integer.
It is formed from the speed reference of the Master using the values of
Parameters 20.01 MINIMUM SPEED or 20.02 MAXIMUM SPEED:
whichever has the greater absolute value determines both the positive
and negative limits that correspond to Reference levels +20000 and
–20000. See the examples in Figure 3-1 below.
In the Follower
Reference 1
is decoded as follows: 20000 corresponds
to the value of Follower Parameter 11.05 EXT REF1 MAXIMUM.
Bit Name Description
0OFF1
Not in use1OFF2
2OFF3
3 RUN 0 = Stop (Master not running)
1 = Run (Master running)
4 RAMP_OUT_ZERO
Not in use5 RAMP_HOLD
6 RAMP_IN_ZERO
7 RESET 0 -> 1 Fault Reset (if an active fault exists)
8 INCHING_1 Not in use
9 INCHING_2 Not in use
10 REMOTE_CMD Fieldbus control enabled
11 EXT_CTRL_LOC Not in use
12-15 Reserved
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