Galil DMC-2X00 user manual Extended I/O of the DMC-2x00 Controller, Error Output

Error Output

The controller provides a TTL signal, ERROR, to indicate a controller error condition. When an error condition occurs, the ERROR signal will go low and the controller LED will go on. An error occurs because of one of the following conditions:

1.At least one axis has a position error greater than the error limit. The error limit is set by using the command ER.

2.The reset line on the controller is held low or is being affected by noise.

3.There is a failure on the controller and the processor is resetting itself.

4.There is a failure with the output IC which drives the error signal.

Extended I/O of the DMC-2x00 Controller

The DMC-2x00 controller offers 64 extended TTL I/O points which can be configured as inputs or outputs in 8 bit increments. Configuration is accomplished with command CO - see Chapter 7. The I/O points are accessed through the 80 pin high density connector labeled EXTENDED I/O.

Interfacing to Grayhill or OPTO-22 G4PB24:

The DMC-2x00 controller uses one 80 Pin high density connector to access the extended I/O. This connector is accessed via the Galil CABLE-80. The Galil CABLE-80 can be converted to (2) 50 pin ribbon cables which are compatible with I/O mounting racks such as Grayhill 70GRCM32-HL and OPTO-22 G4PB24. To convert the 80 pin cable, use the CB-50-80 adapter from Galil. The 50 pin ribbon cables which connect to the CB-50-80 connect directly into the I/O mounting racks. The CB- 50-80 adapter board is described in the appendix.

When using the OPTO-22 G4PB24 I/O mounting rack, the user will only have access to 48 of the 64 I/O points available on the controller. Block 5 and Block 9 must be configured as inputs and will be grounded by the I/O rack.

46 • Chapter 3 Connecting Hardware DMC-2X00