Milltronics COMPU-M User manual

COMPU-M
Instruction Manual PL-516 April 2001
COMPU-M INTEGRATOR
33455160
Rev. 2.2
INTEGRATOR

© Siemens Milltronics Process Instruments Inc. 2001
Safety Guidelines
Warning notices must be observed to ensure personal safety as well as that of others, and to protect the product and the connected equipment.
These warning notices are accompanied by a clarification of the level of caution to be observed.
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:This product can only function properly and safely if it is correctly transported, stored, installed, set up, operated, and maintained.
Note: Always use product in accordance with specifications.
Copyright Siemens Milltronics Process
Instruments Inc. 2000. All Rights Reserved Disclaimer of Liability
This document is available in bound version and in
electronic version. We encourage users to purchase
authorized bound manuals, or to 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.
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 contents of
this manual are regularly reviewed and
corrections are included in subsequent editions.
We welcome all suggestions for improvement.
Technical data subject to change.
MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments Inc.
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: techpub[email protected]om
For the library of SMPI instruction manuals, visit our Web site: 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 59
PROGRAMMING CHART 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 , provides operation, and programming/calibration information specific to Compu-M applications.
The programming/calibration of the Compu-M may be further optimized by referring to
Parameters .
To assist the operator in programming the Compu-M, a
Programming Chart is provided. Transfer the
required data from the Design Data Sheet or the values established from
Parameters onto the Programming
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
Parameters may be
reviewed simultaneously.
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 Ωmaximum 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
suitable location for conduit entrances
Milltronics recommends using a punch
for making holes in enclosure.
91 mm
(3.6")
lid screws
(6 places)
209 mm
(8.2")
172 mm
(6.8")
16 mm
(0.6")
285 mm
(11.2")
267 mm
(10.5")
lid
enclosure
customer
mounting screw
mounting holes
(accessed under lid
4.3 mm (0.17") dia.
4 places
Non metallic enclosure does not provide grounding between connections.
Use grounding type bushings and jumpers.
PL-516 12

COMPU-M LAYOUT
board B
Isolator (optional)
LCD
board
board A
dc terminals shall be supplied from an SELV source in accordance with IEC-1010-1 Annex H.
All field wiring must have insulation suitable for at least 250 V.
PL-516 13

INTERCONNECTION
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)
customer device
customer alarm
or control device
customer remote
totalizer
relay output
totalizer output
mA output
PL-516 14

COMPU-M / BELT SCALE INTERCONNECTION
LVDT
SINGLE LOAD CELL *
DUAL LOAD CELLS *
Compu-M
scale junction box
set switch SW1 on board B to ‘OPEN’ Compu-M
scale junction box
Compu-M
scale junction box
PL-516 15

COMPU-M / MMI-2 (tandem dual load cells)*
*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)
load cell ‘B’
load cell ‘A’
Compu-M
MSI #1
MSI #2
customer junction box
customer junction box
scale wiring
load cell ‘B’
load cell ‘A’ scale wiring
PL-516 16

COMPU - M / SPEED SENSOR ▲INTERCONNECTION
* 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
MD-36 *
Compu-M
MD-2000 A *
TASS - 3
OR
PL-516 17

COMPU-M / FLOWMETER INTERCONNECTION
LVDT
SINGLE LOAD CELL
DUAL LOAD CELLS
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’
» Compu-M (board B) TB1 - 21 to junction box terminal ‘– EXC’
set switch SW1 on board B to ‘Open’
load cell
‘A’ load cell
‘B’
*For connection to an encapsulated LVDT (provided for hazardous environments) YEL = white and BLU = orange.
PL-516 18

ANCILLARY CONNECTIONS
AUTO ZERO
ANALOG OUTPUT
ANALOG OUTPUT 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.
2. Analog output must not be grounded, 750Ωmaximum load.
3. Compu-M to LIs - 1 isolator wiring by Milltronics if isolator is factory installed.
prefeed activated
dry contact
to analog
input device
isolated 4 - 20 mA output wiring 600Ωload
optional LIs - 1
isolator
Compu-M
(board B)
Compu-M
(board B)
Compu-M
(board B)
PL-516 19

ALARM RELAY
REMOTE SWITCHES
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.
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.
to Alarm / Control device
ALT RESET SPAN ZERO
DISP
PL-516 20