IDEC MICROSmart FC6A Series User Manual page 150

2: P S
RODUCT PECIFICATIONS
Calculation Method of I/O Data Refresh Time
When expansion modules are used with the CPU module, an approximate value for the I/O data refresh time can be calculated
with the following equations.
Use the I/O data refresh time obtained with the following equations as a rough estimate.
■ When Not Using an Expansion Interface Module (FC6A-EXM2, FC6A-EXM1M, or FC6A-EXM1S)
I/O data refresh time =
Example:
Plus CPU Module
I/O data refresh time = 4 × 0.04 ms + 2 × 0.17 ms + 1 × 0.34 ms + 0 × 1.09 ms + scan time
■ When Using an Expansion Interface Module (Expander) (FC6A-EXM2)
I/O data refresh time =
Example:
Plus CPU Module
I/O data refresh time = 7 × 0.08 ms + 5 × 0.29 ms + 1 × 0.58 ms + 2 × 1.09 ms + scan time
2-120
( ) module(s) + ( ) module(s)
× 0.04 ms × 0.17 ms
Digital I/O module Analog I/O module
Analog I/O Modules
Digital I/O Modules
= 0.84 ms + scan time
( ) module(s) + ( ) module(s)
× 0.08 ms × 0.29 ms
Digital I/O module Analog I/O module
Digital I/O Modules
= 4.77 ms + scan time
FC6A S MICROS
ERIES
+ ( ) module(s) + (
× 0.34 ms
PID module
PID Module
+ ( ) module(s) + (
× 0.58 ms
PID module
Expansion Interface Module
(Expander) (FC6A-EXM2)
Analog I/O Modules
U ' M FC9Y-B1722
MART SER S ANUAL
) module(s) + scan time
× 1.09 ms
Communication
module
) module(s) + scan time
× 1.09 ms
Communication
module
PID Module
Communication
Modules