problems with clock memory bit

You have something in the tag table use M220's memory.  Maybe MB220, MW220, MD220 or something like that.  Or you manually created the tag and the system created it automatically when you recompiled the hardware after setting the address to 220. 

tris5678

Hello

I wanted some advice as I’m having problems getting the clock memory bit to work,

I am using the S7 1200 PLC and TIA portal V15, I have enabled clock memory bit and

changed the memory number to 220 so it is in free space, if you look in PLC tags the

clock bits show up as %m220.0 to %m220.7

When I compile the program I get the warning

Access to “clock_1Hz” with ambiguous address

When looking in the program the nameclock_1Hz is orange not black, see image below.

Thank you in advance for you time and help

See attached for my best guess at why the newly addressed clock memory bits are not working. 

tris5678

Hi

Yes it looks like I made a second tag manually, I removed all and re addressed to 410, this corrected the orange tag but in run/ monitor mode it's still not working.

thanks

Verify the PLC is in RUN mode. 

tris5678

Hi

Yes it looks like I made a second tag manually, I removed all and re addressed to 410, this corrected the orange tag but in run/ monitor mode it's still not working.

thanks