No value for OB40 Point_addr using FM350-1

[mulderm 3]

Hi everyone, I have a S7-300 CPU315-2DP PLC setup with an FM350-1 counter. With an input count and let him make use of a hardware interrupt. The interrupt is created by: closing the gate hardware, achieving a comparison value 1 or 2. I've tested or OB40 is called in and he does, I just want to know which interrupt is being made. Interrupt the conclusion of the hardware gate, reaching comparison value reached 1 or 2 from comparison value. Have made a move in OB40 namely: # OB40_POINT_ADDR move to MD40 Only he remains always 0. Why does it not, and how do I know? Regards, mulderm