I am having problems communicating serially with the Zebra. It has protocol ZPLII but it will not print.
Is there a workaround?
Try a null-modem cable, may be the serial connection is not inverted.
See if the port is OK with a loopback between pin 2 and 3 in Service/Peripheral test.
Set the following on both sides:
// Set Zebra on: Protocol None (not in Zebra mode !, ZPL II)
// Communications Normal mode
// Control Prefix 7Eh (~)
// Format Prefix 5Eh (^)
// Control Prefix 2Ch (,)
// ZPL Mode ZPL II
// Baudrate 9600, 8, N, 1, XON/XOFF
// Password 1234
Try production mode topsheet with a 3 records file put in d:/editorgt/data/topsheet and make a layout on the first zebra printer.
If it does not work, try running the Zebra program from COM1 or COM2 and print something to make sure the printer is operational.