11 Programming of Cycles 05.91
11.6 Data transfer: System memory into R parameter
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Main group 3/subgroup a: Read PLC signal words in R parameters
@3a0 <Var> <Value 1> <Value 2> <Value3>
The state of an input word in the PLC is read in the parameter defined by <Var>. The
PLC number is defined by <Value 1> and the word address by <Value 2>. The
dimension identifier <Value 3> specifies how the state of the PLC signal word is to be
read.
Definition of dimension identifier <Value 3>:
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<Value 3>
BCD
100 Value without decimal point
101 Value with decimal point
102 1 place after the decimal point
103 2 places after the decimal point
104 3 places after the decimal point
105 4 places after the decimal point
106 5 places after the decimal point
107 6 places after the decimal point
108 7 places after the decimal point
109 8 places after the decimal point
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<Value 3>
Fixed point:
0 Value without decimal point
1 Value with decimal point
2 1 place after the decimal point
3 2 places after the decimal point
4 3 places after the decimal point
5 4 places after the decimal point
6 5 places after the decimal point
7 6 places after the decimal point
8 7 places after the decimal point
9 8 places after the decimal point
Example:
@3a0 R50 K1 K3 K100 The state of the defined PLC input word is read in R50
in BCD format.
@3a1 <Var> <Value 1> <Value 2> <Value3>
The state of an output word in the PLC is read in the parameter defined by <Var>. The
PLC number is defined by <Value 1> and the word address by <Value 2>. The
dimension identifier <Value 3> specifies how the state of the PLC signal word is to be
read.
@3a2 <Var> <Value 1> <Value 2> <Value3>
The state of a peripheral word in the PLC is read in the parameter defined by <Var>. The
PLC number is defined by <Value 1> and the word address by <Value 2>. The
dimension identifier <Value 3> specifies how the state of the PLC signal word is to be
read.
Definition of the dimension identifier <Value 3>: see @3a0
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If the "Read PLC peripheral word" command (@3a2) addresses a word
which is not present in the PLC, alarm 3004 ”CL800 error” is output.
11–22 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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