Programación Plc - Rice Lake Motoweigh Manual De Operación

Detección de Metales
5.4 PROGRAMACIÓN PLC
1. The PLC communicates with the Metal Detector using two 6-word blocks of memory in the Generic Ethernet Module.
Each word is 16 bits.
MD:O.
Data[0]
Data[1]
Data[2]
Data[3]
Data[4]
Data[5]
2. The PLC initiates all communication with the Metal Detector by first filling in the necessary output (send) parameters,
then writing (a command) to MD:O.Data[1].
3. When the Metal Detector responds with the same command and any associated input (receive) parameters, the PLC
writes a NO-OP command 0xFF to MD.O.Data[1] and the Metal Detector responds with 0x00.
4. The following Metal Detector commands are available
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PLC output
reserved
command
param 1 to send
param 2 to send
param 3 to send
reserved
Tabla 5-1. Comunicación PLC
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MD:I.
Data[0] metal detector status
Data[1] command confirmation
Data[2] received param 1
Data[3] received param 2
Data[4] received param 3
Data[5] metal detector heartbeat
PLC input