Mitsubishi Electric MELSEC iQ-R Series User Manual page 23

Sending timing
Low speed cyclic transmission is performed separately from normal cyclic transmission.
This section describes the sending method setting, send processing interval, and link cycle for low speed cyclic transmission.
The following indicates the sending method.
Sending method
Transmit Data of One Station in 1 Scan.
Fixed Interval Cycle Setting
System Timer Setting
*1 The maximum number of stations that can be sent during one link scan of normal cyclic transmission varies depending on the
"Maximum No. of Transient Transmissions" setting.
■Send processing interval
The following system configuration examples are used for explanation.
(1)
(1) Control station (station No.1)
(2) Normal station (station No.2)
(3) Normal station (station No.3)
(4) Normal station (station No.4)
Ex.
For "Transmit Data of One Station in 1 Scan.", "Fixed Interval Cycle Setting (Maximum No. of Transient Transmissions: 1)",
and "System Timer Setting (Maximum No. of Transient Transmissions: 1)"
Station Station Station
No.1 No.2 No.3
Low- Low-
Low-speed
speed speed
cyclic transmission
data data
Low-
Station No.1
LB/LW
speed
sending
data
Station No.2
LB/LW
sending
Station No.3
sending
Station No.4
sending
(1)
(1) Normal link scan
(2) Send processing interval
Description
Sends low speed cyclic data for one station maximum during one link scan of normal cyclic transmission.
Sends low speed cyclic data in the link cycle of the specified time period.
Sends low speed cyclic data in the link cycle of the specified time.
(2)
Station
No.4
Low- Low-
speed speed
data data
LB/LW
Low-
LB/LW speed
data
LB/LW LB/LW
LB/LW
(1)
(3)
LB/LW
LB/LW
Low-
LB/LW speed
data
LB/LW LB/LW
(1)
(2)
*1
*1
(4)
LB/LW
LB/LW
LB/LW
Low-
LB/LW
speed
data
(1)
1 FUNCTIONS
1.1 Cyclic Transmission Function
1
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