
B-63983EN/02 4.LADDER LANGUAGE
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Control conditions
(a) Reset (RST)
RST=0: Release reset
RST=1: Resets error output W1. In other words, makes W1=0.
(b) Command (ACT)
ACT=0: Do not execute ADDB. W1 does not change now.
ACT=1: Execute ADDB.
Parameters
(a) Format specification
Specifies data length (1, 2, and 4 bytes) and the format for the
addend (constant or address).
Data length specification
1: 1 byte length data
2: 2 bytes length data
4: 4 bytes length data
0
Format specification
0: Constant data
1: Address data
0
(b) Augend address
Address containing the augend.
(c) Addend data (address)
Specification in (a) determines the format of the addend.
(d) Result output address
Specifies the address to contain the result of operation.
Error output (W1)
W1=0: Operation correct
W1=1: Operation incorrect
W1 goes on (W1=1) if the result of addition exceeds the
specified data length.