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Multiple Cpu High Speed Refresh Function - Mitsubishi Electric MOTION CONTROLLERS Q172DCPU Programming Manual

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2 MULTIPLE CPU SYSTEM

2.3.3 Multiple CPU high speed refresh function

Classification
Item
Setting No.
Display
CPU
Device
setting
User setting
Points
Refresh cycle Operation cycle (fixed)
This function is used to update the data between internal devices of Motion CPU and
the Multiple CPU high speed transmission area. This occurs every operation cycle as
defined in the device setting of automatic refresh in the self CPU.
Description
Setting No. which executes high speed
refresh is displayed.
CPU No. set in the automatic refresh setting
is automatically displayed by setting devices.
Self CPU : Refresh from the internal device
of Motion CPU to Multiple CPU
high speed transmission area.
Other CPU : Refresh form the Multiple CPU
high speed transmission area to
internal device of Motion CPU.
Set the device No. of Motion CPU to execute
the high speed refreshes.
Set the number of points to refresh data of
each data in word unit.
(Note) Refresh is not executed when not set.
(1) Application example of Multiple CPU high speed refresh function
Multiple CPU high speed refresh function is used as in the following applications.
1) Read the data such as the real current value and synchronous encoder
current value with PLC CPU at high speed.
2) Exchange the FIN waiting signal at high speed.
Setting/display value
1 to 128
(Up to 128)
CPU No. 1 to No.4
Usable device : D, W, #,
SD, M, X, Y, B, SM
Range: 2 to 256 [points]
(Note-1)
Unit: 2 points
2 - 25
Restriction
• The start device number must be a
multiple of 16 for the bit device.
• Do not set a device not setting also
set in the automatic refresh.
• No. of "start device + number of
points" cannot exceed setting
range of each setting No. in
automatic refresh setting.
• Do not overlap the device No.
between setting No..
• Sets the total of all CPUs to 256
points or lower.
(Note-1) : Point in word unit.

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