MA1044 MAQ20-RTD31/-RTD41 Hardware User Manual
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9.0 Building a System
An automated I/O module registration process reduces system setup to three basic steps:
STANDARD SETUP PROCESS
1.) Install a MAQ20-BKPLx backbone in a DIN rail then insert a MAQ20-COMx module in the left-
most position and apply power.
2.) Install any MAQ20 I/O Module in any vacant local or remote backbone position. Observe that the
green Power LED is on and communications activity is seen on the TX and RX LEDs. Allow 1
second for registration. This module has now been assigned Registration Number 1.
Label and connect field wiring to the I/O Module. If desired, record module physical position in
the system.
3.) Repeat Step 2 for all remaining MAQ20 I/O modules in the system. Subsequent modules installed
are assigned Registration Number 2, 3, etc., allowing 1 second for registration. The Registration
Number sequence matches the physical sequence of module installation.
ALTERNATE SETUP PROCESS
1.) Do not apply power. Install a MAQ20-BKPLx backbone in a DIN rail then insert a MAQ20-COMx
module in the left-most position and install all required MAQ20 I/O modules in any vacant local
or remote backbone position. Label and connect field wiring to the I/O Module and if desired
record physical position in the system.
2.) Apply system power and observe that each module has the green Power LED on and
communications activity is seen on the TX and RX LEDs. Registration is complete when module
TX and RX LEDs all have a repeating blink pattern. All modules have now been assigned
Registration Numbers, but in a random sequence not associated with the physical position on
the backbone.
NOTES:
Once the registration process is complete, Registration Numbers are permanent as long as I/O modules are not
removed from or added to a system. When system power is cycled or the system is reset, I/O module
Registration Numbers will always remain the same. If I/O modules are removed while the system is powered,
they will be unregistered and the slots or registration numbers become available to register new modules once
inserted. If I/O modules are removed while the system is powered and then the power is cycled, the remaining
modules will remain registered with their originally assigned Registration Numbers.
I/O modules in a system are identified in general by their model number (MAQ20-RTD31, MAQ20-VDN, etc.)
and uniquely by their Serial Number printed on the side label (i.e. 1234567-89). When I/O modules are installed
in the system, only a general identifier is visible on the front of the module (RTD, V, TC, etc.). Wire tags or
additional labeling applied to the module terminal block may be used for visible unique identification in an
installed system.
MAQ20-940 ReDAQ Shape Software for MAQ20 automatically assigns tag names to each input and output
channel. These can be changed by the customer to associate channels with input wiring or parameters
measured and controlled.
The system does not identify I/O modules by physical position on a backbone, only by registration sequence.
MAQ20-940 ReDAQ Shape Software for MAQ20 provided by Dataforth shows a graphical representation of a
system based on registration sequence and not by physical position. Tools within the software package allow
the user to reassign and save Registration Numbers thereby making graphical representations match physical
location for a single, local backbone and retain permanence. Refer to the
MAQ20 I/O Module Registration
section
for further details.
Module Detect: A write to the Module Detect register at I/O module register address 98 plus the module offset
based on Registration Number will blink the STAT LED on the top angled surface of the module at a 5Hz rate
for 5 seconds so the module location in a system can be visually identified.