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COMPU-M
Instruction Manual
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Milltronics COMPU-M Instruction Manual

COMPU-M
INTEGRATOR
Instruction Manual PL-516 April 2001
33455160 Rev. 2.2
Safety Guidelines
Qualified Personnel
This device/system may only be set up and operated in conjunction with this manual. Qualified personnel are only authorized to install and operate this equipment in accordance with established safety practices and standards.
Warning
Note
This product can only function prope r ly and saf ely if it is correctly transported, stored, installed, set up , operated, and maintained.
:
Always use product in accordance with specifications.
:
Copyright Siemens Milltronics Process
Disclaimer of Liability
Instruments Inc. 2000. All Rights Reserved
This document is available in bound version and in electronic version. We encourage user s to purchase authorized bound manuals, or t o view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc. Siemens Milltronics Process Instruments Inc. will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions.
MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments Inc.
While we have verified the contents of this manual for agreement with the instrumentation described, variations remain possible. Thus we cannot guarantee full agreement. The content s of this manual are regularly reviewed and corrections are included in subsequent editions. We welcome all suggestions for improvement.
Technical data subject to change.
Contact SMPI Technical Publications at the following address:
Technical Publications Siemens Milltronics Process Instruments Inc. 1954 Technology Drive, P.O. Box 4225 Peterborough, Ontario, Canada, K9J 7B1 Email: techpubs@milltronics.c om
For the library of SMPI instruction manuals, visit our Web site:
© Siemens Milltronics Process Instruments Inc. 2001
www.milltronics.com

TABLE OF CONTENTS

Section Page
GENERAL INFORMATION
The Compu-M 5 About the Compu-M 5
SPECIFICATIONS
Compu-M 7 Current Output Isolator 8 Cabling 9 Options 9
INSTALLATION
Compu-M 11 Outline and Mounting 12 Compu-M Layout 13 Interconnection 14
System Diagram 14 Compu-M / Belt Scale 15 Compu-M / MMI-2 16 Compu-M / Speed Sensor 17 Compu-M / Flowmeter 18 Ancillary Connections 19
Power Connections 22
PROGRAMMING
Operating Modes 23 Keypad 23 Parameter Entry 24 Display Messages 25
PL-516 3
APPLICATIONS
Belt Scales
Operation 27 Initial Start Up 28 Linearization 35 Programming Chart - Example 38 Recalibration 39
Solids Flowmeters
Operation 45 Test Rate 46 Initial Start Up 46 Linearization 51 Programming Chart - Example 53 Recalibration 54
PARAMETERS
PROGRAMMING CHART
59
75
PL-516 4

GENERAL INFORMATION

ABOUT THIS MANUAL
It is essential that this instruction manual, PL-453, be referred to during the installation and start up of the Compu-M.
Applications
The programming/calibration of the Compu-M may be further optimized by referring to To assist the operator in programming the Compu-M, a
required data from the Design Data Sheet or the values established from Chart. The Programming Chart parameter orientation is designed to permit convenient sequential parameter programming. The programming chart may be folded out so the chart and reviewed simultaneously.
, provides operation, and programming/calibration information specific to Compu-M applications.
Programming Chart
Parameters
Parameters
is provided. Transfer the
onto the Programming
Parameters
may be
.
ABOUT THE COMPU-M
The Compu-M is to be used only in the manner
outlined in this instruction manual.
The Compu-M is a microprocessor based integrator designed specifically for bulk dry solids in-line weighing applications.
If the current material transport system is by conveyor belt, the Compu-M is used in conjunction with a belt scale. The Compu-M provides a local display of: load, speed, flowrate and total flow.
If the application material is free flowing, the Compu-M is combined with a dry solids flowmeter. The Compu-M provides flowrate and total flow displays.
The Compu-M also provides an analog mA output signal proportional to flowrate, a contact for remote totalizer operation and a relay contact for rate alarm.
Programming is accomplished via the front cover membrane keypad. The Compu-M prompts the operator to enter the information required to complete basic programming. Additional programming features may be utilized to tailor the Compu-M operation to a specific application.
The level of operator access may be defined to ensure programming is not inadvertently altered during normal operation.
Calibration is automatic and relatively simple to achieve. In the calibrate mode, operating conditions are simulated to perform a zero and span calibration. A material test may then be performed to verify system accuracy. If required, the Compu-M may be programmed to correct any accuracy deviation.
During normal operation the user may select any of the available local displays and select the display light if desired. Access to the totalizer reset feature and other functions may be permitted depending on the level of operator access chosen when the system was programmed.
PL-516 5
PL-516 6

SPECIFICATIONS

COMPU-M
Power : » standard : » 100/115/200/230 V ac ± 10%, 50/60 Hz, 15 VA
» optional : » 12 ± 2 V dc, 15 W
» 24 ± 4 V dc, 15 W
Environmental : » location : » indoor
» altitude : » 2000 m max » ambient temperature : » – 20 to 50 °C (– 5 to 122 °F) » relative humidity : » 80 % for temperatures up to 50 °C » installation category : » II » pollution degree : » 2
Inputs : » load cell : » 0 - 45 mV dc per load cell, 2 cells maximum
» LVDT : » 0 - 0.75 V rms, 2.9 kHz » speed sensor : » 5 - 15 V dc pulses, 2 Hz to 10 kHz (for belt scales only)
Outputs : » analog : » 0.1% resolution
» 0 - 20 or 4 - 20 mA, non-isolated
» 750 Ω maximum load » speed sensor excitation : » 12 V dc, 50 mA maximum » totalizer, remote : » contact closure 32-288 ms duration
» 1 form "C" relay contact rated 2 A at 250 V ac,
50 VA maximum resistive
» 15 closures per second maximum » alarm relay : » 1 S.P.D.T. contact rated at 5 A at 250 V ac non-inductive » load cell excitation : » 10 V dc nominal, 100 mA maximum » LVDT excitation : » 2.5 V ac rms, 2.9 kHz
Displays : » liquid crystal : » 8 digits, 13 mm (0.5") high with backlight
» LED : » 4 display mode indicators
Accuracy : » ± 0.1% of span
PL-516 7
Resolution : » ± 0.02% of span Memory : » EEPROM (non-volatile) no back-up battery required
Enclosure : » standard : » 209 mm W x 285 mm H x 92 mm D
(8.2" W x 11.2" H x 3.6" D) polycarbonate
Keypad : » 20 key sealed membrane with tactile feedback
Weight : » standard : » 2.5 kg (5 lb.)
Approvals : » CE * , FM, CSA
NRTL/C
* EMC performance available upon request
CURRENT OUTPUT ISOLATOR (optional)
Model : » LIs-1 loop isolator Input : » 4-20 mA dc (from Compu-M) Output : » 4-20 mA dc into 600 ohms maximum Common Mode Rejection : » 100 dB at 50 Hz Weight : » 0.27 kg (0.6 lb.)
PL-516 8
CABLING
Load cell : » single, non-sensing : » Belden 8404, 4 wire shielded, 20 AWG or equivalent
» maximum run 150 m (500 ft.) » single, sensing : » Belden 9260, 6 wire shielded, 20 AWG or equivalent
» maximum run 305 m (1000 ft.) » dual, non-sensing : » Belden 9260, 6 wire shielded, 20 AWG or equivalent
» maximum run 150 m (500 ft.) » dual, sensing : » Belden 8418, 8 wire shielded, 20 AWG or equivalent
» maximum run 305 m (1000 ft.)
LVDT : » Belden 8404, 4 wire shielded, 20 AWG or equivalent
» maximum run 150 m (500 ft.)
Speed sensor : » Belden 8770, 3 wire shielded, 18 AWG or equivalent
» maximum run 305 m (1000 ft.)
OPTIONS
Incline compensator : » refer to product instruction manual, (for variable incline conveyors) Barrier strips : » required for intrinsic safety
PL-516 9
PL-516 10

INSTALLATION

Installation shall only be performed by qualified personnel
and in accordance with local governing regulations.
COMPU-M
The Compu-M should be mounted in an area that is within the units ambient temperature range, and is suitable for the specified enclosure. The front cover should be accessible for programming and viewing.
It is advisable to keep the Compu-M away from high voltage or current runs, contactors, and SCR control drives.
This product is susceptible to electrostatic shock.
Follow proper grounding procedures.
Do not mount the COMPU-M in direct sunlight
without the use of a sunshield.
PL-516 11
OUTLINE AND MOUNTING
209 mm
16 mm
(0.6")
(8.2")
172 mm
(6.8")
lid screws (6 places)
285 mm
(11.2")
91 mm
(3.6")
267 mm
(10.5")
lid
suitable location for conduit entrances
Milltronics recommends using a punch
for making holes in enclosure.
mounting holes
(accessed under lid
4.3 mm (0.17") dia. 4 places
enclosure
mounting screw
Non metallic enclosure does not provide grounding between connections.
Use grounding type bushings and jumpers.
customer
PL-516 12
COMPU-M LAYOUT
All field wiring must have insulation suitable for at least 250 V.
LCD
board
board A
Isolator (optional)
dc terminals shall be supplied from an SELV source in accordance with IEC-1010-1 Annex H.
PL-516 13
board B
INTERCONNECTION
customer device
Load cell or LVDT, speed sensor, analog mA output, auto zero and low voltage contact wiring may be run in a common conduit. However, these may not be run in the same conduit as high voltage contact or power wiring.
SYSTEM DIAGRAM
Compu-M
load sensor (e.g. beltscale or flowmeter)
speed sensor (optional)
mA output
relay output
customer alarm or control device
PL-516 14
totalizer output
customer remote totalizer
COMPU-M / BELT SCALE INTERCONNECTION
LVDT
scale junction box
SINGLE LOAD CELL *
scale junction box
DUAL LOAD CELLS *
set switch SW1 on board B to ‘OPEN’
Compu-M
Compu-M
scale junction box
PL-516 15
Compu-M
COMPU-M / MMI-2 (tandem dual load cells)*
load cell ‘A’
customer junction box
load cell ‘A’
load cell ‘B’
scale wiring
MSI #1
Compu-M
load cell ‘B’
scale wiring
MSI #2
customer junction box
* 1. Where a belt scale must be installed in a hazardous area, consult Milltronics or your
distributor for wiring instructions.
2. Where the integrator to load cell belt scale separation exceeds 150 m (500 ft.) : » A) remove jumpers from Compu-M (board B) TB1 - 19 / 20 and TB1 - 21 / 22 » B) run an additional shielded conductor from each of :
» Compu-M (board B) TB1 - 20 to junction box terminal ‘+ EXC’ (red) » Compu-M (board B) TB1 - 21 to junction box terminal ‘– EXC’ (black)
PL-516 16
COMPU - M / SPEED SENSOR ▲ INTERCONNECTION
Compu-M
MD-36 *
MD-2000 A *
OR
TASS - 3
* Connect Compu-M (board B) TB1 - 12 to speed sensor terminal strip:
» position ‘2’ for clockwise speed sensor shaft rotation » position ‘3’ for counter-clockwise speed sensor shaft rotation.
Speed sensor shaft rotation is viewed from the front cover side of the speed sensor enclosure.
▲
If a speed sensor is not used, a jumper must be connected across Compu-M (board B) TB1 - 13 / 14
PL-516 17
COMPU-M / FLOWMETER INTERCONNECTION
LVDT
* For connection to an encapsulated LVDT (provided for hazardous environments) YEL = whit e and BLU = or ange.
SINGLE LOAD CELL
DUAL LOAD CELLS
load cell
‘A’
1. Where a belt scale must be installed in a hazardous area, consult Milltronics or your
distributor for wiring instructions.
2. Where the integrator to load cell belt scale separation exceeds 150 m (500 ft.) :
set switch SW1 on board B to ‘Open’
load cell
‘B’
» A) remove jumpers from Compu-M (board B) TB1 - 19 / 20 and TB1 - 21 / 22 » B) run an additional shielded conductor from each of :
» Compu-M (board B) TB1 - 20 to junction box terminal ‘+ EXC’ » Compu-M (board B) TB1 - 21 to junction box terminal ‘– EXC’
PL-516 18
ANCILLARY CONNECTIONS
prefeed activated dry contact
Compu-M (board B)
AUTO ZERO
ANALOG OUTPUT
Compu-M (board B)
Compu-M (board B)
ANALOG OUTPUT ISOLATOR
optional LIs - 1 isolator
1. Auto Zero dry contact may be provided by a material prefeed control device, such that the contact is closed when the material feed is stopped.
to analog input device
isolated 4 - 20 mA output wiring 600 Ω load
PL-516 19
2. Analog output must not be grounded, 750 Ω maximum load.
3. Compu-M to LIs - 1 isolator wiring by Milltronics if isolator is factory installed.
ALARM RELAY
Relay not selected (P - 20 = 0) TB2 - 1,2 = open, TB2 - 2,3 = closed Relay selected (Normal operation) TB2 - 1,2 = closed, TB2 - 2,3 = open Relay selected (Alarm Condition) TB2 - 1,2 = open, TB2 - 2,3 = closed
Relay is certified for use in equipment where the short circuit capacity of the circuits in which they
are connected is limited by fuses having ratings not exceeding the rating of the relays.
REMOTE SWITCHES
to Alarm / Control device
ALT RESET SPAN ZERO DISP
1. Relay contacts are rated for 5 A @ 250 V ac.
2. Remote pushbutton switches normally open style, supplied by Milltronics only on particular Compu-M arrangements.
PL-516 20
REMOTE TOTALIZER
1. Refer to remote totalizer manufacturers instructions for wiring and power requirements.
Compu-M (board B)
2. If totalizer power is 24 V dc or less the remote totalizer wiring may be run in a common
conduit with any combination of :
A) LVDT or Load cell wiring B) Analog output wiring C) Speed sensor wiring
PL-516 21
POWER CONNECTIONS
AC Power
Voltage 100 / 115 / 200 / 230 V Select 50 / 60 Hz 15 VA
Switch shown in ‘Off’ position. Select appropriate voltage.
select voltage via switch
DC Power
The equipment must be protected by a 15 A fuse or
circuit breaker in the building installation.
A circuit breaker or switch in the building installation, marked
as the disconnect switch, shall be in close proximity to the
equipment and within easy reach of the operator.
Connect the Compu-M via terminal 28 to protective earth / ground.
12 V dc Model 24 V dc Model
10 to 14 V dc 20 to 28 V dc
dc terminals shall be supplied from an SELV source in accordance with IEC-1010-1 Annex H.
PL-516 22

PROGRAMMING

OPERATING MODES
The Compu-M has two selectable modes of operation: "Access" or "Run". In either mode, parameter values may be viewed, accepted or altered, zero and span calibrations may be initiated and the totalizer may be reset. However the level of access to these functions is determined by the security parameter P66. Attempting to perform a function outside of the access security level will result in a display message
The access mode is automatically assumed upon initial power up and upon completion of zero and span calibrations or Factoring (P9).
[ E1 ].
The run mode is the normal operating mode and may be selected by pressing mode, the desired display mode is selected by pressing
"ALT DISP" until the corresponding display mode
"RUN" or "ALT DISP". In the run
indicator LED on the Compu-M front cover is illuminated. All operator programmed information is maintained in non-volatile EEPROM memory and therefore is retained
in the event of a power interruption. The Compu-M will return to the previous operating mode when power resumes.
The level of access security chosen may limit operator access to some of the following keypad functions.
KEYPAD
Button Function
"0"..."9" numeric entries "4" increase analog mA output (P13 and P14 only) "8" decrease analog mA output (P13 and P14 only)
"." decimal point "-" access mode: negative entry,
run mode: activate/deactivate LCD backlight
"RUN" enter the run mode, return to previously selected display mode "PAR" access parameter for entry or viewing "ZERO" activate zero calibration or view current zero count "SPAN" activate span calibration or view current span count "ALT access mode: enter the run mode, return to previously selected display mode
DISP" run mode: scrolls through display modes, cancels Auto Scroll display (P21) "RESET reset local totalizer to zero (0)
TOTAL"
"CLEAR" "ENTER" enter parameter number selected, display current parameter value,
clear display
enter display value into selected parameter number, accept zero, or span calibration deviation
PL-516 23
PARAMETER ENTRY
Specific application information must be entered into the appropriate Compu-M memory locations. These locations are identified by a
(value). To enter specific application information the operator accesses the desired parameter, views
value
parameter number
(P#). The information entered is referred to as a
parameter
the parameter value on the LCD display, and then accepts or alters the current parameter value.
P## ####
Parameter Number (P#)
Parameter Value
DIRECT PARAMETER ACCESS
To directly access any parameter, press
"PAR". If [P ] is presently displayed, the Compu-M is currently
prompting the operator to enter a parameter number. Enter the desired parameter number as listed on the Compu-M front cover or in Parameters. If
e.g. press
"PAR"
[P ] will be displayed, P01 is desired
press
"O" and then "1"
[P01 ]
will be displayed
[P# ] is displayed the Compu-M is currently in the access mode.
AUTOMATIC PARAMETER ACCESS (APA)
Values for parameters: P01, 02, 0, 1, 2, 3, 4, 5, 6, 7 must be entered to complete basic programming. Upon accessing any of these parameters, pressing
"ENTER" will cause the Compu-M to enter the current parameter
value displayed and automatically access the next parameter in this loop. e.g.
[P01 1] is displayed
press
"ENTER"
[P02 1]
will be displayed
VIEW PARAMETER VALUES
To view a parameter’s contents, access the desired parameter as previously described. Automatically accessed parameter values are immediately displayed. Direct accessed parameters will require
"ENTER" to
be pressed in order to view the current value. e.g.
[P50 ] is displayed
press
"ENTER"
[P50 #]
will be displayed
PL-516 24
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