# Simulating Input registers in Modbus Server in Node-red
**URL:** https://discourse.nodered.org/t/simulating-input-registers-in-modbus-server-in-node-red/26736
**Category:** General
**Created:** [16 May 2020 06:52 UTC](https://discourse.nodered.org/t/simulating-input-registers-in-modbus-server-in-node-red/26736 "2020-05-16T06:52:49Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@saimohanty](https://discourse.nodered.org/u/saimohanty)
#### Post date: [16 May 2020 06:52 UTC](https://discourse.nodered.org/t/simulating-input-registers-in-modbus-server-in-node-red/26736/1 "2020-05-16T06:52:50Z")
Hi All,
I have created a modbus tcp server in node-red and using third party clienttool to read/write registers.
I am able to write/read to holding registers and coils. But i want to simulate a particular input register in modbus server created in node-red and want to read the simulated value in client.
I am using the below code for simulating some analog values to input registers
**msg.payload = {**
\*\* 'value': msg.payload, \*\*
\*\* 'register': 'input', \*\*
\*\* 'address': 0 , \*\*
\*\* 'disableMsgOutput' : 0 \*\*
\*\*}; \*\*
**return msg;**
but if i want to write to a particular address say 30050 then below code does not work.
msg.payload = {
'value': msg.payload,
'register': 'input',
'address': 50,
'disableMsgOutput' : 0
};
return msg;
Please suggest how to send simulated values to particular input register address of modbus server running on node-red.
Thanks.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [15 July 2020 06:52 UTC](https://discourse.nodered.org/t/simulating-input-registers-in-modbus-server-in-node-red/26736/2 "2020-07-15T06:52:52Z")
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