Trumpmatic 500R Dumping Operation Coding

We've got a cnc trumpf 500r punch. There is a small chip tray on the bottom of the machine that collects chips as they are punched. When we program this with our software (metacam) it automatically does the dumping operation after each tool change so for most parts this tray doesn't fill up. We recently have been punching these large panels that fill up the chip tray relatively quickly without a tool change. Unfortunately our software doesn't allow for us to add in additional dumping operations. I'm wondering what the G-Code or program is that we could manually put into the code that opens this flap/dumps the chips.