Analog Inputs; Outputs; General Use Digital Outputs; Amp Enable - Galil Motion Control CDS-3310 User Manual

Analog Inputs

The CDS-3310 has two analog inputs configured for the range between 0V and 5V. The inputs are
decoded by a 12-bit A/D decoder giving a voltage resolution of approximately 1 mV (a 16-bit A/D is
available on the DB-28040). The impedance of these inputs is effectively infinite. The analog inputs
are read with @AN[x] where x is a number 1 thru 2.

Outputs

The general outputs, amp enable, output compare, and error outputs are 0 or 5V digital outputs:

General Use Digital Outputs

The general use outputs are TTL and are labeled DGTL OUT 1 to DGTL OUT 10 on the silkscreen on
the sheet metal. These outputs can be turned On and Off with the commands, SB (Set Bit), CB (Clear
Bit), OB (Output Bit), and OP (Output Port). The value of the outputs can be checked with the
operand _OP and the function @OUT[] (see Chapter 7, Mathematical Functions and Expressions).

Amp Enable

This signal is used by the controller internally to disable the amplifier and is exposed for optional
external connection. The signal toggles with the commands MO and SH.

Output Compare

The output compare signal is TTL and is labeled COMPARE on the silkscreen. Output compare is
controlled by the position of any of the main encoders on the controller. The output can be
programmed to produce an active low pulse (1usec) based on an incremental encoder value or to
activate once when an axis position has been passed. For further information, see the command OC in
the Command Reference.

Error Output

The error output is TTL and is available on the breakout modules 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:
i
22 Chapter 3 Connecting I/O
1. The 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.
CDS-3310