Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 69)

4Ć7
access to registers defined as INPUT. All other registers (those
without rails connected) will have no access allowed.
Whenever the rail configuration is to be physically changed (i.e., rails
added or removed), the drop should first be disconnected from the
network (disconnect the BNC Tee Adapter from the Remote I/O
Head). The drop should then be powered down before the rail
configuration is modified.
WARNING
INPUTS SHOULD NOT BE FORCED. DURING A POWER CYCLE, THE FORCED
INPUTS ARE INTERPRETED AS OUTPUTS AND, THEREFORE, WILL NOT
FUNCTION PROPERLY. FAILURE TO OBSERVE THIS PRECAUTION COULD
RESULT IN BODILY INJURY.
4.6.4 Remote Drive Interface Head Configuration
The Remote Drive Interface Head can control up to four drives that
use a railĆtype interface (e.g., the Reliance V★S GPĆ2000/VTAC V
controller). The AutoMax Remote Drive Interface Head must not
be connected to Local Heads, digital rails, or Analog Rails, LED
modules, or Thumbwheel Switch modules.
The Remote Drive Interface Head uses a fixed configuration of two
inputs and two outputs per I/O port. The Head assumes that the first
two registers (0 and 1) are AutoMax outputs (information to the drive)
and the second two registers (2 and 3) are AutoMax inputs
(information from the drive). This configuration cannot be changed.
The Remote Drive Interface Head will communicate with a device
connected to a port only if that device responds as a Local Head.
The Head will not reset when communication reĆtries to a port are
exhausted. The Ready Relay will not drop out. The Head will clear
input registers and continuously attempt to reĆestablish
communication with the device connected to the port.
AutoMax application tasks must be used to determine whether a
drive is communicating with the Head using a register or bit
generated by the drive. Refer to the documentation for the Rail
Interface module (D2Ć3170) and the GPĆ2000/VTAC V Main Controller
Installation, Operation and Maintenance instruction manual for more
information.
WARNING
REMOVING OR INSERTING A MODULE OR I/O INTERCONNECT CABLE WITH
POWER APPLIED MAY RESULT IN UNEXPECTED MACHINE MOTION OR LOSS
OF PROCESS CONTROL. STOP THE MACHINE OR PROCESS IN AN ORDERLY
FASHION AND DISCONNECT THE POWER TO THE SYSTEM BEFORE YOU
REMOVE OR INSERT A MODULE OR I/O INTERCONNECT CABLE. FAILURE TO
OBSERVE THESE PRECAUTIONS COULD RESULT IN BODILY INJURY.
Whenever the configuration is to be physically changed (i.e., drives
added or removed), the drop should first be disconnected from the
network (disconnect the BNC Tee Adapter from the Remote Drive
Interface Head). The drop should then be powered down before the
configuration is modified.