Overview
Users can select an RS-485 communication function option for the YS1700 Programmable Indicating Controller. The communication protocol for the YS1000 series is summarized in table 1 below.
Table 1 RS-485 communication protocol for the YS1000 series
| |
Communication protcol |
Purpose/host system |
1 |
PC link |
YOKOGAWA's PLC(FA-M3) |
2 |
Modbus |
PLC,PC |
3 |
YS protocol |
YOKOGAWA's DCS(CENTUM CS),PC,PLC |
4 |
Peer-to-Peer communication |
Connect with YS1700 |
This document provides an example application using peer-to-peer communication among YS1000 series instruments with the communication function.
New Function: Peer-to-peer Communication Features
With peer-to-peer communication, up to 32 YS1700 can be connected interchangeably. Four of the connected instruments can each output 4 points of analog data and 16 points of status data.
This makes data exchange and I/O sharing possible since all instruments under peer-to-peer communications can read all data (16 analog and 64 status data).
Maximum no. of connections: 32
No. of receiving units: 32
No. of transmitting units: 4
Transmitted data: 4 analog and 16 status data per transmitting YS1700
Communication interval: 200 ms average (not synchronized to the control computation interval)
Maximum cable length: 1.2 km (when using the conforming cable)