241
CHAPTER 10 DEDICATED INSTRUCTIONS
10
10.2 Precautions for Dedicated Instructions
10.2.2 Precautions for link dedicated instructions
10.2.2 Precautions for link dedicated instructions
The following describes precautions when using link dedicated instructions.
(1) Executing multiple link dedicated instructions simultaneously
When executing multiple link dedicated instructions simultaneously, make sure that the channels for the
instructions are not duplicated. Link dedicated instructions with the same channel cannot be executed
simultaneously. To use the same channel for multiple link dedicated instructions, execute one after completion of
another. The completion status of the dedicated instruction can be checked by the completion device of the
dedicated instruction.
(a) Channel
A channel is an area of a network module where data handled by a link dedicated instruction is stored. By
using multiple channels, it is possible to simultaneously access from the own station to other stations or
concurrently read from and write to the same network module.
(b) Number of channels
The master/local module has 2 channels that can be used for link dedicated instructions. By using 2 channels
simultaneously, two instructions can be executed at the same time.
*1
*1 For the REMFR/REMTO instruction, up to 32 channels can be used.
(c) Number of link dedicated instructions that can be simultaneously executed
Even when channels are not duplicated, do not simultaneously execute link dedicated instructions exceeding
the numbers listed below.
If the number of instructions exceeds the following, execute the instructions one by one.
Link scan time
Number of link dedicated instructions that can be simultaneously executed
Master station is in
"Online (Normal Mode)"
Master station is in
"Online (High Speed Mode)"
1ms to 7ms 34 34
8ms to 50ms 34 1
51ms to 200ms 5 1
To Next Page
Loading...
