Rockwell-automation 20-COMM-R Remote I/O Adapter Manual do Utilizador descarregar pdf (Página 68)

5-10 Using Block Transfer Messaging

20-COMM-R Remote I/O Adapter User Manual

Publication 20COMM-UM004D-EN-P

Ladder Logic Program

Figure 5.4 PLC-5 Example Ladder Logic for Block Transfer Messaging

The word length used in the BTW and BTR must be equal to 20, 30, or 60.

It must also be greater than or equal to the byte length used in Word 0 of the

message, converted to words (1 word = 2 bytes).

The user initiates a messaging transaction by setting the User Execute Message Input bit true. This causes one messaging BTW to be sent to the 20-COMM-R.

0000

N7:2

User

EXECUTE MESSAGE

Input

ONS

B3:0

Execute Message

This rung causes one messaging BTW to execute when the 20-COMM-R is ready to receive a Messaging BTW and the user has requested the BTW.

0001

B3:0

Execute Message

I:010

Messaging BT

BTW AVAILABLE

Status

I:010

Messaging BT

BTR AVAILABLE

Status

BTW

Block Transfer Write

Module Type Generic Block Transfer

Rack 001

Group 0

Module 0

Control Block BT9:2

Data File N12:0

Length 20

Continuous No

BTW

B3:0

Execute Message

This rung will wait until a BTR is available from the 20-COMM-R module and then execute a BTR.

0002

I:010

Messaging BT

BTR AVAILABLE

Status

BTR

Block Transfer Read

Module Type Generic Block Transfer

Rack 001

Group 0

Module 0

Control Block BT9:3

Data File N13:0

Length 20

Continuous No

BTR

0003

END

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 127 128

Comentários a estes Manuais

Sem comentários

Rockwell-automation 20-COMM-R Remote I/O Adapter Manual do Utilizador Página 68

Comentários a estes Manuais

Manuais e produtos relacionados com Equipamento Rockwell-automation 20-COMM-R Remote I/O Adapter