Modbus Info Registers starting at 00091 report some invariant information about the IO-FEP2 like the device serial number. M&C device drivers usually read these registers only once when the communication to the device has been established.
Register Purpose Remarks
00091 device serial number ascii string, 0-terminated
00101 software version ascii string, 0-terminated
00111 software capabilities bitmask, see below
00112 licensed features bitmask, see below
Software Capabilities Encoding
The software capabilities register reports which software functions are available with this IO-FEP2. This information is included for compatibility reasons, the sat-nms IO-FEP2 device driver uses this to enable the particular functions
bit 0 (lsb) 1 = extension board installed. always reads 1.
bit 1 1 = protection switching. reads 1 if this feature is
licensed.
bit 2 1 = power supply alarms are detected.
reads always 1.
bit 3 1 = ntp clock synchronisation support.
reads always 1.
... bits 4 to 15 are reserved for future use. they
bit 15 (msb) actually read 0.
Licensed Features Encoding
Some functions in the IO-FEP2 require license key to be enabled. This register reports which of these functions are licensed with this IO-FEP2.
bit 0 (lsb) 1 = inputs 17..32 are licensed
bit 1 1 = inputs 33..48 are licensed
bit 2 1 = wave guide switches 5..8 are licensed
bit 3 1 = wave guide switches 9..12 are licensed
bit 4 1 = wave guide switches 13..16 are licensed
bit 5 1 = protection switching is licensed
bit 6 1 = temperature control loops are licensed
bit 7 1 = LNA supply monitoring is licensed
... bits 8 to 15 are reserved for future use. They
bit 15 (msb) actually read 0.