Have you ever needed to analyze a series of Modbus TCP message?
CAS Modbus TCP Parser

Have you ever needed to analyze a Modbus RTU message?
CAS Modbus RTU Parser

Do you want to know more about your BACnet device on your network ?
CAS BACnet Explorer

FS-8700-02 - Modbus Plus

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Driver Code:	MB+
Version:	1.00
Devices Supported:	Modbus+ devices
Interface:	SA85 (requires the 8915-01 Modbus Plus Single Port or 8915-19 Modbus Plus Dual Port Adapter Card)

Command/SubCommand Supported:

Command	Description
01	Read Discrete Output Status (0xxxx)
02	Read Discrete Input Status (1xxxx)
03	Read Output Registers (4xxxx)
04	Read Input Registers (3xxxx)
05	Force Single Coil (0xxxx)
06	Preset Single Register (4xxxx)
15	Force Multiple Coils (0xxxx)
16	Preset Multiple Registers (4xxxx)

User can configure FieldServer to handle Modbus Plus internal paths 1-8, each path can handle 254 Modbus Station addresses.