Panasonic FP E Series User Manual page 231

Error detection time for transmission assurance relays
The power supply of any given PLC fails or is turned off, it takes (as a default value) 6.4 seconds for the
transmission assurance relay of the PLC to be turned off at the other stations. This time period can be
shortened using the SYS1 instruction.
<Programming example of SYS1 instruction>
(SYS1, M PCLK1T1, 100)
Function:
Setting SYS1 to change the time that the PC(PLC) link transmission assurance is off from the default
value of 6400 ms to 100 ms.
Keywords:
Setting for key word no. 1: PCLK1T1
Permissible range for key word no. 2: 100 to 6400 (100 ms to 6400 ms)
Note) Enter one space after M and then enter 12 characters to be aligned to the right.
If the second keyword is 3 digits, put 2 spaces, and if it is 4 digits, no space is needed.
Note:
The setting should not be changed as long as a longer transmission assurance relay detection
time does not cause any problems.
• The SYS1 instruction should be executed at the beginning of the program, at the rise of R9014. The
same time should be set for all linked PLCs.
• The time should be set to a value of at least twice the maximum transmission cycle time when all of the
PLCs are connected to the link.
• If short time has been set, the transmission assurance relay may not function properly. (The shortest
time that can be set is 100 ms.)
Note)
7-81