Dear Sirs,
I need to write 30 * 16-bit (Ushort) registers as one block ,to a modbus tcp device, at 40000 address.
I have created 30, ushort, holding register, variables and an action in a button with mutliple (30) SET_VARIABLE commands ,where i set each variable the needed value.
I also have set for each variable starting address 0 (and as a anothher solution each variable with ascending address of 0,1,2,3 ..29).
Unfortunately it doesn't seem to work.
Can you advise how to do this ?
Regards,
Antonis
Hello Antonis,
In principle, your approach looks right. Setting starting address 0 for all variables does not work.
Do you get any error message? Are the values written to the modbus tcp device or is there a problem beforehand?
Regards,
Dominik
The values are written to the Modbus tcp device one-by-one using FC=06 (Write Single Holding Register) 30 times
We need to write the 30 registers as one block, using FC=16 (Write Multiple Holding Registers) 1 time, in order for the device to accept the message.
Changing the QuickHMI settings:
Data sources > Advanced > Register Write Function > F16
in the editor options does not solve the issue (still uses F06 multiple times).
Hello,
there is currently a technical limitation where only one variable/register can be writte per request. So even though FC16 is used it will send 30 individual request using FC16.
Is there an estimate of whether this technical difficulty will be overcome?
