154
Serial communications
ACH550-01 User's Manual
Reference signal source selection
Code Setting for fieldbus control & description Range
1102
EXT1/EXT2 SEL
-6…12
Defines the source for selecting between the two external control
locations
EXT
1 or
EXT
2. Thus, defines the source for Start/Stop/Direction
commands and reference signals.
8 =
COMM
– Assigns control of the drive via external control location
EXT
1 or
EXT
2 based on the fieldbus control word.
• Bit 5 of Command Word 1 (parameter 0301) defines the active
external control location (
EXT
1 or
EXT
2).
• See the fieldbus user’s manual for detailed instructions.
1103
REF1 SELECT
0…17
Selects the signal source for external reference
REF
1.
8 =
COMM
– Defines the fieldbus as the reference source.
9 =
COMM
+
AI
1 – Defines a fieldbus and analogue input 1 (
AI
1)
combination as the reference source. See
Analogue input reference
correction
on page
191
.
10 =
COMM
*
AI
1 – Defines a fieldbus and analogue input 1 (
AI
1)
combination as the reference source. See
Analogue input reference
correction
on page
191
.
1106
REF2 SELECT
0…19
Selects the signal source for external reference
REF
2.
8 =
COMM
– Defines the fieldbus as the reference source.
9 =
COMM
+
AI
1 – Defines a fieldbus and analogue input 1 (
AI
1)
combination as the reference source. See
Analogue input reference
correction
on page
191
.
10 =
COMM
*
AI
1 – Defines a fieldbus and analogue input 1 (
AI
1)
combination as the reference source. See
Analogue input reference
correction
on page
191
.
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