Siemens SIMATIC IM 151/CPU Manual page 184

Instruction List
B.40 Jump Instructions
Jumping as a function of conditions. The jump width in an 8-bit address ID is
between (–128 to +127). The jump width in 16-bit address IDs is between (–32768
to –129) or (+128 to +32767).
Note on JC
Please note in the case of CPU 614 programs that the jump destination always
forms the beginning of a Boolean logic string. The jump destination must not be
included in the logic string.
In-
Address
struc-
ID
tion
JU LABEL Jump unconditionally
Status word for: JU
Instruction depends on:
Instruction controls:
JC LABEL Jump if RLO="1"
JCN LABEL Jump if RLO="0"
Status word for: JC, JCN
Instruction depends on:
Instruction controls:
JCB LABEL Jump if RLO="1"
Save the RLO in the BR bit
JNB LABEL Jump if RLO="0"
Save the RLO in the BR bit
Status word for: JCB, JNB
Instruction depends on:
Instruction controls:
JBI LABEL Jump if BR="1"
JNBI LABEL Jump if BR="0"
Status word for: JBI, JNBI
Instruction depends on:
Instruction controls:
* 1 word long for jump widths of between –128 and +127
B-50
Description
BR A1 A0
– – –
– – –
BR A1 A0
– – –
– – –
BR A1 A0
– – –
Yes – –
BR A1 A0
Yes – –
– – –
Length
Typical Execution Time in
in
s
Words
1*/2 1.8
OV OS OR STA
– – – –
– – – –
1/2 1.5
2 1.6
OV OS OR STA
– – – –
– – 0 1
2 1.8
2 1.8
OV OS OR STA
– – – –
– – 0 1
2 1.5
2 1.5
OV OS OR STA
– – – –
– – 0 1
ET 200S Interface Module IM 151/CPU
A5E00058783-01
RLO /FC
– –
– –
RLO /FC
Yes –
1 0
RLO /FC
Yes –
1 0
RLO /FC
– –
– 0