Specifications

PICED FAQ

Page 27

1.3.3.3 Using a PAC as a PCI

Problem

How can a PAC be used as a PC Interface ?

Solution

The USB driver for the PAC maps the USB connection to a serial port. When you plug a PAC into

the USB port of your computer, a serial port will be assigned. You can then use this serial port with

any software which is expecting a connection to a PCI, and the PAC will operate as a PCI.

Notes :

The PAC can not be used for its normal functions while operating as a PCI

To stop the PAC from operating as a PCI, you need to disconnect the USB cable.

See also

C-Touch as a PCI for details on setting hand-shaking lines

PAC Virtual Serial Port.

1.3.3.4 PAC Status LED

Problem

What does the flashing of the Status LED mean ?

Solution

Status LED Behaviour Meaning

Flashing 2.5 times per

second

Normal operation. LED changes state each time logic is run.

Flashing fast Fault with the firmware. Need to transfer new firmware and user

file.

Always on Fault with user configuration data file. Need to transfer new user

file.

Goes off for several seconds Logic has had a run-time error and the logic engine has had to

re-start. Most common cause is that the logic has taken too long

to execute.

Always off Logic is having an error on every scan. Most common cause is

that the logic has taken too long to execute.

1.3.3.5 Why doesn't my logic work ?

Problem

Why doesn't my logic work ?

Solution

There are many possible reasons for logic code not working as expected. Is is recommended that

you run the logic code with the PICED software first and fully test and debug it there. The PICED

software has more options available for resolving logic problems. When the logic is operating

correctly, then transfer it to the PAC.

The only features available in the PAC to support debugging are :