Specifications

14
Protocol Parameters GE Fanuc SNP Section 2-2
2.2 Protocol Parameters GE Fanuc SNP
The parameters of the interface SER1 are set to the following values:
Baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 357000,
500000 Baud
Parity: none, even, odd
Data length: 5, 6, 7, 8 bits
Stopbits: 1, 1.5, 2
Handshake: No handshake, Hardware, Software
The default parameters of the programming software are printed bold.
The operating terminal adapts to the default parameters of the SNP protocol.
Therefore it is generally not necessary to alter the interface parameters in the PLC.
2.2.1 Parameter Maximum Waiting Time for Response
This timer indicates the length of time that the operating terminal (master) will wait
for the response from the PLC (slave).
Permitted values are in the range of 50 ms to 65535 ms.
The default value is 1000 ms.
2.2.2 Parameter Delay Until Connection Setup
Specifies the period of time that the terminal allows to elapse after an unsuccessful
attempt to establish the communication and before making another attempt.
Permitted values are in the range of 5000 ms to 255000 ms.
The default value is 10000 ms.
2.3 Configuring the PLC
Before any communication between the operating terminal and FANUC-PLC is
possible, it will be necessary to set the CPU ID parameter with the aid of a LM90.
2.3.1 CPU - ID
The operating terminal considers the PLC a slave and, thus, references it via a
slave number. This slave number is assigned to the variable during the creation of
the application definition. Valid slave numbers range from value 1 to value 253.
Having defined a slave number 1 to 253 in the application definition will require that
the same CPU-ID consisting of 3 characters must be specified in the PLC. Any
blank digits will be filled in with zeros (slave number 23 corresponds to the CPU-
identifier 023).
It is also possible to work without a CPU-identifier by specifying the slave identifier
254 in the application definition. In this event it must be ensured that the connection
between terminal and PLC is a point-to-point-connection.