Plc Program; Dtam Plus Devicenet - Allen-Bradley 2755-LS7-SB User Manual

E–14 Application Examples

DTAM Plus DeviceNet

Publication 2755-6.9
Note that Termination 1 is set for \0xa or Line Feed [LF], and
Termination 2 is set for \0xd or Carriage Return [CR]. These
terminators, along with the ARL instruction in the PLC-5
controllers, allow you to read one message at a time with [CR]
[LF] terminators.

PLC Program

The sample ladder logic listing below instructs the PLC-5 controllers
to:
Rung 2:0 – Read one string of ASCII data terminated with a
[CR] [LF].
This application example describes how to configure and operate the
readers when using an RS-232 cable connected to a DTAM Plus
Operator Interface (Catalog Nos. 2707-L8P1D, 2707-L8P2D,
2707-L40P1D, 2707–L40P2D, 2707-V40P1D, 2707-V40P2D, or
2707-V40P2ND) on a DeviceNet network.
ATTENTION: Do not install the RS-232 cable with
power applied to either the interface box or DTAM
!
Operator Interface. Failure to follow this caution may
result in damage to the reader, interface box, or DTAM
Operator Interface.