Hello My project is to connect modbus energy meter with modbus
I need help about how to use Modbus driver - I read
Modbus Address Mapping - Ignition User Manual 8.1 - Ignition Documentation (inductiveautomation.com)
I lunch ignition maker v8
my serial to USB is COM 4 i check RS485 box instead of 232.
I need to configure adress table
Prefix Start End Step Unit ID Modbus Type Modbus Address
I need to read MODBUS SLAVE n°1
register = 0
length = 2
register type = 4 : input register
32 bit float and need to swap word to get voltage value
modbus doctor is ok
I getmesssage IN OPC quick explorer with this adress paramter
Prefix Start End Step Unit ID Modbus Type Modbus Address
V 0 0 1 INPUT FLOAT 0000
Read completed. [Ignition OPC UA Server]ns=1;s=[Compteur Energie]1.V0
strong textValue: null
Quality: Bad("Bad_Timeout: The operation timed out.")
Timestamp: 01/01/1601 04:00:00 GST
any help apreciated
I try to correctly write S30x0000 in Ignition driver format
PS : My radix is 10
Im OK with offset 1 for modbus adress value is good 
im happy !
Read completed. [Ignition OPC UA Server]ns=1;s=[Compteur Energie]1.V1
Value: 237.01779
Quality: Good
Timestamp: 27/09/2023 20:24:01 GST