The PC series with omron CPM1A PLC connection

As shown in figure 7 - 21 a shows a point-to-point connection structure, called 1:1 HOST Link communication mode. CPM1A series PLC no RS232C serial communication port, it is through the mouth communicate with PC peripherals communication, thus CPM1A should configure RS232C communication adapter CPM1 - CIF01（ The mode switch should be set in the 'HOST') To use them. 1:1 HOST Link communication, PC information issuing commands to PLC, PLC returns a response message to PC. At this time, the PC can monitor the working state of the PLC, such as monitoring, fault alarm, PLC control system of certain data, etc. Can also modify online some value and the current value of the PLC, rewrite the PLC controller user program, etc. Figure 7 - 21 PC series and CPM1A PLC connection a) 1:1 b) As shown in figure 7-1: N 21 b for multipoint connection structure, called a 1: N HOST Link communication, one can connect most 32 bit machines PLC. Under this way of communication, superior confidential by linking adapter B500 - AL004 connected with CPM1A series PLC, should be in each PLC communication port with a RS422 adapter. Using 1: N HOST Link communication mode, can use more than one on a machine to monitor the working state of the PLC controller, DCS control.
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