2 MULTIPLE CPU SYSTEM

2.3.3 Multiple CPU high speed refresh function

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.

Classification

Item

Description

Setting/display value

 

Restriction

 

Setting No.

Setting No. which executes high speed

1 to 128

 

 

 

refresh is displayed.

(Up to 128)

 

 

 

 

 

 

 

 

CPU No. set in the automatic refresh setting

 

 

 

 

 

is automatically displayed by setting devices.

 

 

 

Display

 

Self CPU : Refresh from the internal device

 

 

 

 

of Motion CPU to Multiple CPU

 

 

 

 

CPU

CPU No. 1 to No.4

 

 

 

high speed transmission area.

 

 

 

 

 

 

 

 

 

Other CPU : Refresh form the Multiple CPU

 

 

 

 

 

high speed transmission area to

 

 

 

 

 

internal device of Motion CPU.

 

 

 

 

 

 

 

• 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.

 

Device

Set the device No. of Motion CPU to execute

Usable device : D, W, #,

• No. of "start device + number of

 

setting

the high speed refreshes.

SD, M, X, Y, B, SM

 

points" cannot exceed setting

User setting

 

 

 

 

range of each setting No. in

 

 

 

 

automatic refresh setting.

 

 

 

 

 

 

 

 

 

• Do not overlap the device No.

 

 

 

 

 

between setting No..

 

 

Set the number of points to refresh data of

Range: 2 to 256 [points]

•

Sets the total of all CPUs to 256

 

Points

each data in word unit.

 

Unit: 2 points (Note-1)

 

points or lower.

 

 

(Note) Refresh is not executed when not set.

 

 

 

 

Refresh cycle

Operation cycle (fixed)

—

 

—

(Note-1) : Point in word unit.

(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.

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