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SIMATIC S7-200: Human machine interface Ktp700 Simple link Including Central processing unit S7-224xp Issue

It has a

panel

HMI KTP700 Basic

together with

CPU S7-224XP (
replacing

the panel

due to

failure of the

electronics
)
.

The project

has a

panel

screens with

time parameters

of the process

control.

Tag

Input

field

output

is presented as

integer.

When you enter

such

a value of

2 seconds
,

the controller

why it

a value of

130

milliseconds
.

I tried to

scale the

value of the

representation

of the tag

in

the PLC

[
1000

to

1
]

and

HMI [
10 to 1
]

did not help.

The question is how

to solve this problem
.

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Answers(1)

HMI Time Display Discrepancy - KTP700 & S7-224XP

The issue stems from differing time unit interpretations between the HMI and the PLC. The S7-224XP likely stores time in milliseconds, while you're inputting seconds on the HMI.

Here's how to address this:

  1. PLC Scaling: Ensure the PLC program correctly converts seconds to milliseconds before writing the value. For example, multiply the input (in seconds) by 1000.
  2. HMI Input & Output: Configure the HMI tag to display the value received from the PLC as milliseconds. Avoid further scaling on the HMI side, as you've already tried that without success.
  3. Data Type Consistency: Verify that both PLC and HMI tags representing the time parameter are configured as integers (or a suitable numeric type) to avoid truncation or rounding errors.

Important Resources:

If the problem persists, please provide the exact PLC code snippet used for time handling and the HMI tag configuration details for further assistance.

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