Operation When Power Supply Is Turned On - Panasonic FP0 User Manual

S−LINK Control Unit
4.5

Operation When Power Supply is Turned On

4.5 Operation When Power Supply is Turned On
Refreshing S−LINK I/O data
With the S−LINK control unit, I/O data is refreshed by the CPUs of both the FP0 section
and the S−LINK section, through the memory shared between them.
S−LINK control unit
I/O data
area
refreshed
Shared
memory
FP0
section
CPU
I/O data refreshed
The illustration below shows the time required until the first refreshing is completed by
the S−LINK control unit after the power supply has been turned on. (The external power
supply for the S−LINK is already on.)
Power supply of S−LINK
control unit turned on
S−LINK section
2.6 seconds
I/O data
refreshed
FP0 section
0.07 seconds
I/O data area
refreshed
When the power supply to the S−LINK control unit is turned on, it takes approximately
2.6 seconds for the S−LINK I/O data to be verified by the FP0 section. Be particularly
careful with regard to the FP0 sequence program, if using the S−LINK input at the b
contact relay when the power supply is turned on.
4 − 10
S−LINK
section
CPU
FP0