User guide

Instructions
Chapter 18
I/O Message and Communication
18–3
Available Configuration Options
The following configuration options are available with a SLC 5/02 processor:
• Peer–to–Peer Write on a local network to another SLC 500 processor
• Peer–to–Peer Read on a local network to another SLC 500 processor
• Peer–to–Peer Write on a local network to a 485CIF (PLC2 emulation)
• Peer–to–Peer Read on a local network to a 485CIF (PLC2 emulation)
Entering Parameters
After you select the MSG instruction on the HHT, the data entry display
appears. You enter seven parameters in the following order.
1. Select Message Type –
F1 F2 F3 F4 F5
ZOOM on MSG –(MSG)– 2.0.0.0.*
NAME: MESSAGE READ/WRITE
MSG TYPE: READ LD/LS ADDR:
TARGET: 500 CPU TARG NODE: 0
CTRL BLK: TARG OS/AD:
CTRL BLK 7 WORDS MSG LEN: 0
SELECT MESSAGE TYPE:
READ WRITE
Choices are READ, WRITE. Read indicates that the local processor
(processor in which the instruction is located) is receiving data; write
indicates that it is sending data.
After you make a selection
[F2] or [F4], the display changes to the
following:
2. Select Target Device –
F1 F2 F3 F4 F5
ZOOM on MSG –(MSG)– 2.0.0.0.*
NAME: MESSAGE READ/WRITE
MSG TYPE: WRITE LD/LS ADDR:
TARGET: 500 CPU TARG NODE: 0
CTRL BLK: TARG OS/AD:
CTRL BLK 7 WORDS MSG LEN: 0
SELECT TARGET DEVICE.
500
CPU 485 CIF
Choices are 500 CPU, 485 CIF. The target device can be a fixed
controller, SLC 5/01, SLC 5/02 processor (500 CPU) or a non–SLC 500
device (485 CIF). For read message instructions, the target device sends
data. For write message instructions, the target device receives data.