Error passing string to "system" command in PLC routines

[RafaelFalcaro]

Hi, I'm tryng to pass a string as parameter to "system" command in a PLC like this:

 

open plc SYSLOG_TEST

	system "logger -i -p user.debug -t test_plc %s", "Testing syslog on Delta Tau"

	disable plc SYSLOG_TEST

close

 

I'm getting this error:

...\21-SyslogTest.plc(30,1) : Error : ( error #31)  data error in equation :   system "logger -i -p user.debug -t test_plc %s", "Testing syslog on Delta Tau"

 

But, at the POWER PMAC SOFTWARE REFERENCE MANUAL, the "system" command description says this:

 

Firmware version: 2.6.0.0

What am I doing wrong?

Edited March 31, 2023 by RafaelFalcaro

[leandro.martins]

I think you have to store the string in the user-buffer and use the address of the beginning of your string.

From the manual

Quote

For a string variable, the expression value (rounded down to the next integer if necessary) represents the starting index in user shared memory of the string variable to be used.

e.g.

L0 = strcpy(6,"test")
system "touch /var/ftp/gather/%s",6

you can use the L0 for some sanity checks

Edited April 4, 2023 by leandro.martins

[RafaelFalcaro]

Thanks, Leandro, it worked very well!