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9.2 Precautions for Dedicated Instructions
9.2.2 Precautions for Link Dedicated Instructions
9
DEDICATED INSTRUCTIONS
POINT
(1) When the same channel is to be set for different tasks, access to one of other
stations first and after completion of the access, access to another.
The completion status of a dedicated instruction can be confirmed with the
completion device of the instruction.
(2) Channels used for RECV instructions cannot be used for any other
instructions.
Channels used for other instructions must be changed.
Remark
The following table shows operations when link dedicated instructions are
executed at the same time.
: Executable, : Executable if not using the same channel (Up to 8 instructions), : Not executable (The latter one is not executed.)
* 1 When the same channel is used, the latter instruction is not executed.
(2) When executing a link dedicated instruction to an AnUCPU station
(a) Do not execute any instruction that cannot be executed to AnUCPU stations.
If executed, the AnUCPU may detect "MAIN CPU DOWN" or "WDT ERROR" and
stop its operation.
Section 4.2.1 (1) List of link dedicated instructions and transient
(b) To execute such an instruction to all of the network which contains an AnUCPU
station, use group specification to exclude the AnUCPU station.
Table 9.5 Availability of concurrent link dedicated instruction executions
Link dedicated instruction
Instruction to be executed concurrently
READ/SREAD/WRITE/SWRITE/REQ/SEND/RECV/
RECVS/RRUN/RSTOP/RTMRD/RTMWR
ZNRD
ZNWR
READ/SREAD/WRITE/SWRITE/REQ/SEND/RECV/
RECVS/RRUN/RSTOP/RTMRD/RTMWR
*1
*1
*1
ZNRD
*1
ZNWR
*1
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