Function - Siemens SIMATIC S5 Equipment Manual

General Function Description
Linear Axis Operating Mode
1.7

1.7.1 Function

The linear axis operating mode is the basic setting for the 1P 241 at the initial start-up, after a
power failure, and after software reset.
Channel 1
0
-99999
Track O
E
' H
Track 1
Track 2
I
A
Track 3
Track 4
I
to
I
Track 15
Encoder
I
Absolute 1–encoder with
Excess–3 Gray code
I
Absolute 2–encoder with BCD code
I
Absolute 2–encoder with binary code
I
Absolute 3–encoder analog
I
Absolute 4–encoder synchronous–serial
The operating mode "linear axis" is always used when one or two axes are available per module
where, within the maximum track area, positions are decoded or simple positioning operations
are performed (drives with fixed rotation speed).
On the next pages two typical examples are shown.
When the area limits are exceeded with incremental and absolute encoders, then in the
event of linear axes the track identifier bits for all tracks and any parameterized inter-
', ; rurXs are set brieflv, and the next actual value disdaved is zero!
This effect can be avoided as follows:
– Prevent the system from exceeding the limits or
– Use the rotary axis mode (see section 1.8)
1 – 14
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Channel 2
o
–99999
Track 18
" H
A
Track 19
Track 20
I
to
A
I
A
Track 31
Maximum track area (represented area)
I
o to +99999
I o
to +99999
o
to +99999
I or O to FFFFF (see section 5.1)
I –
1023 to +1023
o
to +99999
I
or O to FFFFF (see section 7.3.1)
R 02/92
A = Initial
E = End
I
I
I
I
I
I
I