5 Categories and Use of Basic Application Instructions
DVP-PM Application Manual 5-21
API Mnemonic Operands Function
08
RPT
Start of a Nested RPT-RPE loop
Controllers
20PM 10PM
Bit Devices Word Devices Program Steps
Type
OP
X Y M S K H KnX KnY KnM KnS T C D V Z
S * * * * * * * * **
RPT: 3 steps
Operands:
S: The number of times for the loop to be repeated
Explanations:
1. No contact to drive the instruction is required.
2. The nested RPT ~ RPE loop can only be 1 level. Errors will occur when the number of levels is more than 1.
API Mnemonic Function
09
RPE End of a Nested RPT-RPE loop
Controllers
20PM 10PM
OP Descriptions Program Steps
N/A
No operand. No contact to drive the instruction is required.
RPE: 1 steps
Explanations:
1. RPT instruction executes the RPT-RPE loop back and forth for “N” times tehn return to the instruction after the
RPT-RPE loop.
2. N = K1 ~ K32,767. N is regarded as K1 when N ≦ K1.
3. CJ instruction can be used to skip or jump out of RPT-RPE loop.
4. An error will occur in the following conditions:
- RPE instruction is placed before RPT instruction.
- RPT instruction exists, but RPE instruction does not exist.
- Number of RPT instructions differs from that of RPE instructinos.
5. The nested RPT ~ RPE loop can only be 1 level. Errors will occur when the number of levels is more than 1.
Program Example 1:
If you would like program section A to execute for 3 times, you can use RPT-RPE written as follows:
RPT K3
RPE
A
Program Example 2:
When X7 = OFF, PLC will execute the program between RPT and RPE. When X7 = ON, CJ instruction jumps to P6
and avoids executing the instructions between RPT and RPE.
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