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Introduction
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Table 1. Digital and Analog I/O Capability
I/O
1708
1716
1700
Digital In
8
16
0
Digital Out
8
16
4
Analog In
4
8
0
Analog Out
0
4
0
The RTU is initialized through the RS-232 port, which allows the user to customize the
parameters for each RTU to best fit the application.
SYSTEM DESCRIPTION
Model 1700
Control Unit
PC, CRT,
Printer or Status
Panel
Transceiver
Transceiver
Transceiver
Transceiver
1708/1716
RTU
Unit #1
I/O Lines
1708/1716
RTU
Unit #2
I/O Lines
1708/1716
RTU
Unit #9
I/O Lines
Figure 1. A Typical System with One Controller and Nine RTUs
Figure 1 depicts a model system that might be used to monitor and control pump stations.
This system gives the user PC or status panel control of turning pumps on or off and of
polling the sites to verify status and to receive alarm reports of pump failures or
communications failures.
MODBUS SYSTEM
MODBUS is an industry-standard protocol used to transfer commands and data. An example
of a SCADA program that uses the MODBUS protocol is Lookout (by National Instruments).
Many PLCs also use the MODBUS protocol. A MODBUS option for the Model 1700
controller allows the controller and Zetron RTUs to be used in a MODBUS system.
Содержание 1708
Страница 1: ...Models 1708 and 1716 Remote Terminal Units Installation and Operation Manual 025 9209K...
Страница 8: ...Contents 025 9209K 8...
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Страница 60: ...Repair 025 9209K 60 MODEL 1700 SERIES ENCLOSURE OUTLINE 024 0057B...
Страница 61: ...Repair 025 9209K 61 MODEL 1700 SERIES ENCLOSURE INSTRUCTIONS 024 0056D Sheet 1 of 2...
Страница 62: ...Repair 025 9209K 62 024 0056D Sheet 2 of 2...
Страница 63: ...Repair 025 9209K 63 MODEL 1708 REMOTE TERMINAL UNIT SILKSCREEN 702 9439F...
Страница 64: ...Repair 025 9209K 64 MODEL 1716 REMOTE TERMINAL UNIT SILKSCREEN 702 9440F...
Страница 72: ...Appendix B 025 9209K 72...
Страница 80: ...Glossary 025 9209K 80...