Milltronics PL-533 Instruction Manual

Interface Module
for Allen-Bradley Remote I/O
33455330 Rev 1.0
Instruction Manual PL-533 March 1997
Technology based. Customer driven.
TABLE OF CONTENTS
About this module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Physical Hardware Set Up
Software Set Up
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Parameter Values
Numeric values “Split values” Text messages Relay function codes
Block Transfers
Block Transfer Write Block Transfer Read
Discrete I/O
Discrete Output Words Discrete Input Words
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Generally…
Specifically…
==================================================================
3 PL-533
ABOUT THIS MODULE
Milltronics SmartLinx module for Allen-Bradley is a ‘plug in’ communications circuit card designed to interface any Milltronics SmartLinx compatible device to Allen-Bradley Remote I/O.
The module may have been shipped installed in your unit, or shipped separate for site installation. Refer to your associated Milltronics device instruction manual for details on its location or physical installation.
=================================================================
SPECIFICATIONS
Electrical: compatible with any Milltronics SmartLinx compatible device and Allen-
Bradley Remote I/O
Physical: compatible with any Milltronics SmartLinx compatible device
Application: compatible with Allen-Bradley Remote I/O
Connection: 3-position terminal block for wire end
Termination: switch selectable, open or 82 internal
Cable: Belden 9463 ‘Blue Hose’ or equivalent
============================================================================
PL-533 4
INSTALLATION
================================================================================
PHYSICAL
Refer to associated Milltronics SmartLinx compatible device instruction manual for location or installation of the module.
HARDWARE SETUP
SmartLinx module for Allen-Bradley Remote I/O
module connector (underside) to Milltronics device
termination switch
cable connector
reserved switches
status LEDs (refer to Operation)
TERMINATION SWITCH
termination setting
open off
150 external* off
82 on
RESERVED SWITCH
setting
all on
CABLE CONNECTION
*termination resistor (as required)
clear
shield
blue
Connect using Belden 9463 ‘Blue Hose’ cable or equivalent and terminate (blue/clear) according to Allen-Bradley specification and conventions.
5 PL-533
SOFTWARE SETUP
GENERAL
It is recommended to set up the Milltronics device as a 1⁄4 rack size, to conserve remote rack space available to the PLC. As discrete I/O operation is very limited when using 1⁄4 rack size configuration, block transfer read and write commands are recommended. Avoid discrete I/O as it does not provide any advantage over block transfers. (Transfer speed is not an issue, as transfer rates are much greater than the rate where new readings are generated by the Milltronics device.)
It is also recommended to exercise caution when deciding how often to trigger the BTR and BTW instructions. Too often increases the delay of all block transfers on the Remote I/O link. A recommended guideline is to trigger the BTR and BTW instructions no faster than every 0.3 seconds.
SPECIFIC PARAMETERS
P751 baud rate
Sets the baud rate for Remote I/O communication between Milltronics device and Allen-Bradley.
values: 0 = 57.6 kbaud
1 = 115.2 kbaud 2 = 230.4 kbaud
The default value is 0.
P752 rack number
Enter the rack number (octal) that the Milltronics device has been assigned on the Remote I/O link. The valid range is 01 – 73. Check your PLC manual for the supported range.
The default value is 2.
P753 starting group
Sets the starting group number for the Milltronics device.
starting group rack size (P754)
values: 0 1, 2, 3 or full
2 1, 2 or 3 /4 4 1 or 2 /4 6 1/4
The default value is 0.
PL-533 6
P754 rack size
Sets the discrete I/O address space. Valid settings are 1 to 4 quarter racks,
dependent upon the starting group (P753).
rack size starting group (P753)
values: 1/4 0, 2, 4 or 6
The default value is 0.
P755 last rack
The last rack is defined as the highest numbered rack on the Remote I/O link.
Determine the position of Milltronics device and set this parameter
accordingly.
value: 0 = not last
The default value is 0.
2/4 0, 2 or 4 3/4 0 or 2 full 0
1 = last
OPERATION
Communication on the Remote I/O link is indicated by the SmartLinx LEDs.
=======================================================================================
on module is powered
off no communication between bus and module flash bus intact, Allen-Bradley PLC in program; or
Milltronics device set to different rack size than PLC
on active communication
on not being scanned by PLC
7 PL-533
APPLICATION LAYER
The application layer is the name given to the organization and format of the discrete I/O and block transfer communications areas of the Milltronics device . All transactions between the PLC and the Milltronics device are either reading parameter values from the Milltronics device, or setting parameter values in the Milltronics device.
This manual refers to a 10 point level instrument; if your device has fewer than 10 points, you should ignore data in registers which represent non-existing points. Those registers will still be present, but will contain undefined values.
===================================================================
PARAMETER VALUES
The Milltronics device parameters take on many values in various formats, as discussed in the Milltronics device manual. For the convenience of the PLC programmer, those values are converted to and from a 16-bit integer number, since those are easily handled by most PLCs. This section describes that conversion process; later sections detail where those values are in discrete I/O and block transfer addresses, and how to get the parameters you need.
Numeric values
Numeric parameter values are by far the most common. For example, parameter P920 (Reading), returns a number representing the current reading (either level or volume, depending on the Milltronics device configuration).
Numeric values may be requested or set in either units or percent of span, and may be specified with a number of decimal places.
Numeric values must be in the range -10,000 to +10,000 to be valid. If a parameter is requested and its value is more than +10,000, the number 32,767 is returned; if it is less than -10,000, the number -32,768 is returned. If this happens, increase the number of decimal places for that parameter.
If a parameter cannot be expressed in terms of percent (e.g. span), or has no meaningful value, the special number 22,222 is returned. Try requesting the parameter in units, or refer to the Milltronics device manual to understand the requested parameter.
“Split” Values
Certain parameters are actually a pair of numbers separated by a colon, in the format xx:yy.
One example is P807, Transducer Noise, where:
xx = the average noise value in dB yy = the peak noise in dB.
PL-533 8
Loading...
+ 17 hidden pages