Galil DMC-3425 user manual TTL Outputs

TTL Outputs

The DMC-3425 provides three general use outputs, an output compare and 4 status LED’s.

The general use outputs are TTL and are accessible through the ICM-1460 as OUT1 thru OUT3. These outputs can be turned On and Off with the commands SB (Set Bit), CB (Clear Bit), OB (Output Bit) and OP (Output Port). For more information about these commands, see the Command Reference. The value of the outputs can be checked with the operand _OP, the function @OUT[] and the distributed control command TZ. Chapter 4 contains more information with regards to I/O in the distributed control network.

The output compare signal is TTL and is available on the ICM-1460 as CMP. 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.

Note: For a controller ordered as a DMC-3425-Stepper, the Error output is taken for the second stepper motor output.

There are four status LEDs on the controller, which indicate operating and error conditions on the controller. Below is a list of those LEDs and their functions.

Green Power LED - The green status LED indicates that the +5V power has been applied properly to the controller.

Red Status/Error LED - The red error LED will flash on initially at power up, and stay lit for approximately 1 – 8 seconds. After this initial power up condition, the LED will illuminate for the following reasons:

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.

Green Link LED – The second green LED is lit when there is an Ethernet connection to the controller. This LED tests only for the physical connection, not for an active or enabled link.

Yellow Activity LED – The yellow LED indicates traffic across the Ethernet connection. This LED will show both transmit and receive activity across the connection. If there is no Ethernet connection or IP address assigned, the LED will flash at regular intervals to show that the BOOTP packets are being broadcast.

Note: For systems using the ICM-1460 or AMP-1460 interconnect module, there is an option to provide opto-isolation for the outputs. In this case, the user provides an isolated power supply (+5V to +24V and ground). For more information, see the section “Opto-Isolation Option for ICM-1460” in the Appendix of this manual, or contact Galil.

DMC-3425 Chapter 3 Connecting Hardware• 41