Allen-Bradley 56RF, Руководство пользователя

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122 Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011
Chapter 12 RFID Tag Speed
Mode Overview
1. Mode 0
The interface waits for the delay time, sends out a read, obtains data, and returns
that data back to the PLC. This cycle repeats until a Stop Continuous Read
command is issued.
2. Mode 1
The interface waits for input point 0 to turn ON, waits for the delay timer to
expire then sends out a read, obtains data, and returns that data back to the PLC.
This cycle repeats until a Stop Continuous Read command is issued.
3. Mode 2
The interface waits for input point 1 to turn ON, waits for the delay timer to
expire then sends out a read, obtains data, and returns that data back to the PLC.
This cycle repeats until a Stop Continuous Read command is issued.
4. Mode 3
The interface waits for both input point 0 and 1 to turn ON, waits for the delay
timer to expire then sends out a read, obtains data, and returns that data back to
the PLC. This cycle repeats until a Stop Continuous Read command is issued.
Command Structure
a. xx:O.Channel[0].Reset =0
b. xx:O.Channel[0].Command = 5
c. xx:O.Channel[0].BlockSize = Bytes per Block in the tag
d. xx:O.Channel[0].Address = Starting Block
e. xx:O.Channel[0].Length = Number of blocks to read
f. xx:O.Channel[0].Timeout = Delay time between sending commands
g. xx:O.Channel[0].UIDLow = 0
h. xx:O.Channel[0].UIDHi = 0
i. xx:O.Channel[0].Data[0] = Mode x
j. xx:O.Channel[0].Data[1] = Option Flag
Address – Block within the tag to start read operations from.
BlockSize – Size in bytes per block of the tag.
Length – Number of blocks to read
Timeout – Delay time between sending command attempts in Mode 0.
Delay time after input condition is true before sending commands in Mode 1-3.