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8300 8315 L&J Tankway Software Description
4.14.2 Application
The MODGW point provides status information for the communications with any Modbus
masters used with the TankGate. On the TankGate Motherboard, the MODGW point is
created automatically whenever the Modbus Slave protocol is defined for a COM point.
The point number created will correspond to the ComPort such that MODGW.1 is created
for COM 1. Use the Upload command from the Config Menu to retrieve the data from the
MODGW point or any other points created automatically by the RTU.
The MODGW point provides information about the current command and data address
requested by the Modbus master system. The MODGW provides assurance that requests
are being received and processed.
Command
Current command. Values include:
1 - Read Output Status
2 - Read Input Status
3 - Read Output Registers
4 - Read Input Registers
5 - Force Single Coil
6 - Preset Single Register
15 - Force Multiple Coils
16 - Preset Multiple Registers
Addr
Data Address for current request
Elapse
Time of the last request from the master
PntCheckSum
CRC-16 Checksum of point's static Configuration Parameters
Dynamic
Parameters
Function