Hello guys,

I need some advice with PtP communication .... how must be correct chronological order and correct conditions for Send_P2P, Receive_P2P and ReceiveReset???

TIA Portal V14

CPU: CPU 1512SP F-1 PN

CM: 6ES7137-6AA00-0BA0 - port config in HWconfig: 2400/parity-none/databits-8/stopbits-1/dataflowcontrol-none

Communication partner: Programmable PSU ISOTECH 603 Baud rate: 2400 baud. Parity bit: none. Data bit: 8 bits.  Stop bit: 1 stop bit.  Data flow control: none.

From user manual to PPSU is this information:

"The power supply has 25 commands available. Every command is end up with(ASCII 0Dh or ACSCII 0D 0A acceptable). The return message of the power supply is CR/LF (ASCII 0D 0A)."

But is here some commands which don´t have the return message, for example

*SV Function: Set the output voltage value. Syntax: SV xx.xxx is a number between 0 and 9. Explain: The power supply will set the desired value of output voltage when the command is received. Example: SV 12.34 Set output voltage to 12.34V

My code for set output voltage in DB for set parameters

'$R' is <CR> as one char of string

CALL  Send_P2P , "Send_P2P_DB"

I see some change in code of SendData_Status (16#7001,16#7002, 16#0000) if I set to "1" SendData_SV_Req but on the PPSU it does not do anything .....why why why .... yes I checked more time the connection between PPSU and PLC

and code for send receive - here isn´t enable signal for Receive_P2P as in previous post on page 1

Is the code correct???

In user manual is one  strange information - see to attached screen

For communication between PPSU and PC must be 12V on pin4, I don´t know if this same condition must be for communication between PLC and PPSU.

thx for your help and sorry for long post 

J.

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Split from S7-1500 and ptp communication (ascii) .

Good morning,

my problem is solved 

all information which I needed is in attached screenshot.

J.