TITAN-SVX Software Manual
page 15
Rev 4.01
For each MODBUS functions supported by TITAN, following special restrictions
apply.
Function
ID
Special Restrictions
1
- Address range must be between 0 to 6
- Multiple coil-read is allowed but the coil range must stay within
the allowed range of Coil 1 to 7.
2
- Address range must be between 0 to 7
- Multiple input-read is allowed but the input range must stay
within input 1 and 8
3
- Only reading a pair of a register is allowed. Any other register
number beside a pair will result in an error reply.
- Start address must be an even register number
5
8
- Only the address 0 is allowed
16
- Only writing a pair of a register is allowed. Any other register
number beside a pair will result in an error reply.
- Start address must be an even register number
Table 4.2
For details of the MODBUS communication protocol, please refer to various
MODBUS protocol documents available online.
