[SGG]

Hello Mikhail,

i use modbus protocol to communication over GPRS to my remote devices which include a master and a slave device.

i want to retain values (of the slave devices) after a temporary loss of communication on the rapid scada interface. This retained values should only change after communication is established and the actual value is polled.

you suggested the use of a formula ” Cnl > 0 ? Cnl : Val() ” in post #5482 BUT i already have formulas in most of the channels.

How do i combine my formula with your suggested formula to resolve my issue or is there any other solution?

[SGG]

Please the image of my setting

Event type:
https://drive.google.com/file/d/1I2TVYQWIYExsYXoi3cRriYh7lFyJWoNn/view?usp=sharing

Unit type:
https://drive.google.com/file/d/1bBsNu1bxYPbepdL8Hu106t9sUmerpSTi/view?usp=sharing

Input type:
https://drive.google.com/file/d/1KiFcUYPWOraU08ovVcj8IubA9pEApfti/view?usp=sharing

• This reply was modified 5 years, 8 months ago by Mikhail.

[SGG]

Hello Mikhail,

I have been trying to invert the status color for input channel following your instruction but I have no success yet.

ACTUAL BEHAVIOR:
I created my own record in the unit table of administrator, “ NORMAL; FAULT “.

when the input channel state is NORMAL, the color of the text is RED and when the input channel state is FAULT, the color of the text is GREEN.

I tried using the formula (Cnl; Cnl > 0 ? 114 : 101) to revert the color so that “NORMAL” text will be GREEN and “FAULT” text will be RED.

Screenshot of my settings are shown below:
Event type:

Unit type:

Input type:

NEEDED BEHAVIOR:

I want the “NORMAL” text to be GREEN and “FAULT” text to be RED.

Help me correct any possible error.
Thanks for your advice.

[SGG]

Hello Mikhail,

I have been trying to invert the status color for input channel following your instruction but no success yet.

i want:

“OFF” to be “NORMAL” with color GREEN.

“ON” to be “FAULT” with color RED.

So i created my own record in the unit table, “NORMAL; FAULT.

Then used a formula at input channel. The formula used is (Cnl; Cnl > 0 ? 114 : 101)

Thanks for your advice.

[SGG]

Hello,

I checked it again, i realised the formula i used before was Cmd*1000 and not CmdVal*1000, i thought they were the same thing.

Its working fine now. Thanks

[SGG]

Hello Mikhail,

i have a challenge and i believe the solution is related to “BitConverter.GetBytes(cmd.CmdVal) method”.

My challenge:
I have a modbus device that connect through an RTU with GPRS to Rapid scada. i have been able to connect it successfully.

For receiving data:
On the modbus device, the register i poll is of 4-bytes. the HMI of the modbus device indicates 15.000 but rapid scada shows 15000 (which is equivalent to 00-00-3A-98 in HEX), so i use a formula of CnlVal/1000 to get 15.000.
The device template, data type i selected for this input is int(4-byte).

For sending data:
if i input 15, the modbus device receives no data

if i input 15000, the modbus device receives the data as 15.000 which is actually what i want to send, but what i want to input is 15 and not 15000.

i tried using the formula of CmdVal*1000 but its not successfull.
The device template, data type i selected for this command is int(4-byte)

What i need is this: i need a formula that will convert 15 to 15000 in an output channel. if the solution is related to “BitConverter.GetBytes(cmd.CmdVal) method”, please, how do i implement this method to achieve my desired result? i don’t really understand C#.

Thanks for your clear advice…

[Author]

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