Rockwell Automation 1395 Digital Reference Adapter for RTP Applications - Manual (Page 9)

Publication 1395-RTP-5.2 September 1997
Chapter
1
Introduction
Description Of Equipment The Digital Reference Adapter Board provides an interface between
an external device and the Bulletin 1395 Main Control Board. When
used with the Reel-Tension-Paster (RTP) Drive, the Digital Reference
Adapter Board allows the Drive to be commanded by a digital
reference input signal from a single channel encoder or frequency
generator whose shaft speed is equal to press speed. In this
application, a magnetic pickup with a gear ranging from 128 to 140
teeth (dependent on printing diameter of the press) is used for the
press speed sensor for the Drive.
The Board also allows the Drive to be controlled using combinations
of internal programmable relay logic at digital inputs #1 through #8
or through use of an analog device such as a dancer potentiometer.
When the analog device is used for control, the dancer potentiometer
provides position feedback sensing and controls the reel speed
through the P/I Regulator located on the Digital Reference Adapter
Board and the process trim regulator located on the Bulletin 1395
Main Control Board.
The Digital Reference Adapter Board is used to interface the RTP
Drive to either of two types of printing press systems:
1. The Advanced Press Control System (APCS) associated with the
Colorliner Press utilizes 24V DC control interfacing to the RTP
Unwind Drive.
2. Modular Press Control System (MPCS) associated with the
Headliner Offset and Flexoliner Presses utilizes 120V AC control
interfacing to the RTP Unwind Drive
Features – The Digital Reference Adapter Board features:
• One Digital Reference Input – Programmable for a single
channel single edge, single channel dual edge, or a dual
channel quadrature encoder or a frequency generator input.
• Ten Discrete Inputs – Nine inputs are application dedicated,
and one is a spare input. With the APCS, utilized inputs are
24V DC, but can be converted using a panel mounted 120V
AC, I/O module required for the MPCS application. The
inputs are connected by default to the internal programmed
logic software for the specific RTP Unwind Drive
application. The remaining spare input (digital input 10) is
programmable to any of the 16 logic command bits of digital
input auxiliary link Parameter 406. All ten inputs utilize LED
indicators for high input level visibility.