Table of Contents
Advertisement
ГК Атлант Инжиниринг – официальный представитель в РФ и СНГ
3.5 I/O Expansion of PLC applications
PLC
7188X/7521
There is a Man Machine Interface in most PLCs. This interface is
originally designed for MMI applications. The 7188X/7521 can use this
interface to build a bridge between PLC & 7000 modules.
The 7188X/7521 can directly read/write the internal memory of the PLC.
Therefore the PLC can access the 7000 input modules as follows:
1. The 7188X/7521 sends commands to the 7000 input modules
2. The 7188X/7521 writes this data to the PLC' s internal memory
3. The PLC accesses this data from the internal memory
The PLC can control the 7000 output modules as follows:
1. The PLC writes data to its internal memory
2. The 7188X/7521 reads this output data from the PLC' s memory
3. The 7188X/7521 sends commands to the 7000 output modules
In this way, the input data of the 7000 modules can be shown on the
touch screen. Also, the user can control the output of the 7000 modules from
the touch screen.
7188XA/B/C & 7521/2/2A/3/4/7 Series Hardware User' s Manual, Ver. 3.0 Sep/2002, 7Mh-001-20 -----
+7(495)109-02-08 sales@bbrc.ru www.bbrc.ru
COM1:RS-232
7000 series
COM2:RS-485
85
Advertisement
Table of Contents
