Siemens SIMATIC IM 151/CPU - Page 185

Instruction List
B-51
ET 200S Interface Module IM 151/CPU
A5E00058783-01
In-
struc-
tion
Address
ID
Description
Length
in
Words
Typical Execution Time in
s
JO LABEL Jump on stored overflow (OV=”1”) 1*/2 1.5
Status word for: JO BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – Yes – – – – –
Instruction controls: – – – – – – – – –
JOS LABEL Jump on stored overflow (OS=”1”) 2 1.6
Status word for: JOS BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – – Yes – – – –
Instruction controls: – – – – 0 – – – –
JUO LABEL Jump if ”instruction unordered” (CC 1=1
and CC 0=1)
2 1.8
JZ LABEL Jump if result=0 (CC 1=0 and CC 0=0) 1*/2 1.7
JP LABEL Jump if result>0 (CC 1=1 and CC 0=0) 1*/2 1.8
JM LABEL Jump if result<0 (CC 1=0 and CC 0=1) 1*/2 1.8
JN LABEL Jump if result0 (CC 1=1 and CC 0=0) or
(CC 1=0) and (CC 0=1)
1*/2 1.8
JMZ LABEL Jump if result0 (CC 1=0 and CC 0=1) or
(CC 1=0 and CC 0=0)
2 1.5
JPZ LABEL Jump if result0 (CC 1=1 and CC 0=0) or
(CC 1=0) and (CC 0=0)
2 1.6
Status word for: JUO, JZ, JP, JM,
JN, JMZ, JPZ
BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – Yes Yes – – – – – –
Instruction controls: – – – – – – – – –
JL LABEL Jump distributor
This instruction is followed by a list of jump
instructions.
The address ID is a jump label to the in-
struction following the list.
ACCU1-L contains the number of the jump
instruction to be executed
2 2.7
LOOP LABEL Decrement ACCU1-L and jump to
ACCU1-L0
(loop programming)
2 1.6
Status word for: JL, LOOP BR A1 A0 OV OS OR STA RLO /FC
Instruction depends on: – – – – – – – – –
Instruction controls: – – – – – – – – –
* 1 word long for jump widths of between –128 and +127