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MPT91 M1

Product catalog summary

General Overview
The MPT91 series is a line of single-loop microprocessor temperature regulators with standard dimensions. They feature inputs from various sensors, dual displays for set-point and process value, and functions like soft start and self-tuning. Options include relay contacts for alarms or cooling control, analogue outputs, and serial communication capabilities.

Technical Characteristics
The instrument supports multiple sensor types and input ranges, offering precise data reading and both on-off and PID control types. It operates on a power supply range of 90 to 260 Vac/Vdc, with specific load requirements for analogue outputs.

Display Messages
The display indicates operational status or errors, such as temperature out of range or sensor malfunctions, with specific error codes for functions like self-tuning and soft start.

Instrument Connection Overview
The front panel includes displays for temperature and set-point, with LEDs for alarm status, ramp function, and load control. The terminal board supports connections for sensors, power supply, and outputs, with configurations for PT100 and thermocouples.

Installation Notes
Installation involves connecting sensors and configuring the instrument for heating, cooling, servomotor, or valve control, with detailed diagrams and instructions provided.

Regulations and Control Functions
The document outlines PID and on-off regulation setup, including parameters like proportional band, integrative and derivative time, and cutback constant. It also covers alarm settings and analogue output configurations.

Serial Output and Communication
Details on serial communication include data reading and writing, command codes, and status word transmission, with MODBUS protocol options and error management.

Password and Default Parameters
The instrument includes a password function for securing settings and a procedure for resetting to default parameters.

Specifications
Includes the use of specific keys for changing settings, setting decimal points, input scales, and control types.

Procedures
Step-by-step instructions for setting up the instrument, including entering passwords, selecting temperature scales, and configuring sensor inputs.

Control Functions
Covers heating-cooling control, servomotor control, and valve control, with instructions for setting parameters like dead bands and output configurations.

Recommendations
Advises careful adherence to procedures for correct setup and operation, highlighting the importance of confirming changes and resetting to factory defaults if needed.

Critical Information

Exigencies: Requires specific configurations for different control functions to avoid improper operation.
Parameters: Accurate setting of parameters like temperature scales and sensor types is crucial.
Limitations: Out-of-range menu items default to maximum values, which users should be aware of.
Best Practices: Use the “Ramp/Exit” key to exit menus and store modified parameters correctly.

Automatic Calculation of Control Constants
Describes setting up automatic calculation of PID control constants for precise temperature control.

Self-Tuning Function
Calculates PID parameters for precise temperature control, with error codes indicating issues during the process.

On-Off Type Regulation
Allows hysteresis programming relative to the set-point, with a dead band for heating-cooling regulation.

Soft-Start Function
Ensures a gradual start by limiting power to 30% of maximum, programmable and can be annulled.

Ramp Set Up
Supports automatic cycles with steps, allowing set point variation, with options for program repetition and delay.

Serial Output
Supports communication with a host computer via RS232, RS422, or RS485 using “mect” or “MODBUS” protocols.

Data Reading and Writing
Details the setup for data transmission between host and instrument, including command codes and response formats.

Command Codes
Lists command codes for programming the MPT91, with some parameters being read-only.

Status Word and Hexadecimal Transmission
Describes transmission of status words in hexadecimal format, with examples for reading and writing.

Ramp Programming with Serial Line
Instructions for programming ramp functions via serial line.

Serial Output with MODBUS Protocol
Instructions for programming the instrument with MODBUS protocol, including setting address and baud rate.

Read Output and Input Status
Functions for reading output and input status, with request and answer formats.

Force Single Coil
Allows forcing a single binary variable ON or OFF, with examples for request and answer formats.

Preset Single Register (06)
Sets the value of a single 16-bit register, with request and response formats.

Read Status (07)
Reads the status of 8 fixed bits, with request and response formats.

Force Multiple Coils (15)
Forces the status of binary variables in a contiguous block, with request and response formats.

Preset Multiple Registers (16)
Sets the value of 16-bit registers in a contiguous block, with request and response formats.

Errors Management
MODBUS errors are categorized into transmission and operative errors, with specific error codes defined.

Password Function
Allows protection of programmed parameters using passwords for main and ramp menus.

Default Parameters (dEF)
Resets all parameters to factory defaults, erasing previous settings.

Notes
Advises on installation precautions and disclaims liability for improper use, noting the lack of a power switch and internal fuse.

Catalog excerpts

USER'S MANUAL

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1.0 GENERAL POINTS The instruments of the family "MPT91" represent a series of " Single Loop" microprocessor temperature regulators in the standard 48x48 dimensions (96 mm. depth.) The complete version of the MPT91 instrument has the following technical characteristics: 1- Input from Thermoresistance PT100 ( scale -40.0 ÷ 200.0°C or -40 ÷ 800°C), or from thermocoupling Fe/CO (0÷600°C) and Cr/Al (0÷1200°C) and Pt-Pt/Rh (0 ÷ 1710°C), or from voltage ( 0÷ 10 V ) and current (0/4 ÷ 20 mA) selectable from the keyboard. 2Two display to see Set-Point and Process Value and 4 keys for an easy programmability....

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MPT91 M1 proportional band: 0 ÷ F.S. °C/°F integrative time: 0 ÷ 6000 sec. derivative time: 0 ÷ 600 sec cutback const.: 0 ÷ F.S. °C/°F of min. or max in the range: 0 ÷ F.S. °C/°F Alarms relay contact 220V /5A Main Outputs relay contact 220V /5A Alarm output Power supply 90 ÷ 260 Vac/Vdc 20÷30Vac/Vdc Analogue outputs 0 ÷ 10 V – 0 ÷ 20 mA – 4 ÷ 20 mA Max load for current 300 Ω output Min load for voltage 1 KΩ output 10 V Max voltage given 20 mA Max current given 12 bits Resolution 1.2 DISPLAY MESSAGES The following table shows a summary of all the messages that the instrument can show on the display....

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MPT91 M1 1.3 MPT INSTRUMENT CONNECTION OVERVIEW DESCRIPTION OF THE FRONT COMMANDS PV-Upper Display: temperature as read by sensor SP-Lower Display: set-point (power percentage on manual control) Led AL: alarm status indication or cooling action or servomotor control drive (if requested ) Led R: ramp function indication Led ON: load control indication : access to the programming functions : increase set-point. Used for programming function : decrease set-point. Used for programming function : enter the enable Ramp programs (disabled of the menu) : START/STOP functions. Only ramp functions (disabled...

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MPT91 M1 DESCRIPTION OF THE TERMINAL BOARD inputs for sensor transducer power supply ( see configurations ) analogue outputs (OAP option) or serial output (if requested) enable second set-point (if RSP option is requested) instrument power supply. Between terminals 7 and 8 power from 90V to 260V , or from 10V to 30V if requested. Terminals 9, 10: contact NO of main relay ( A option ) or static output (C option) or alarm 2 conctat (OAP option) and analogue output control. Terminals 11, 12: contact NO of alarm relay (if requested: 03 option) For thermoresistance connection pay attention to the...

Open the catalog to page 8

VOLTAGE OR CURRENT INPUT CONNECTIONS CURRENT/VOLTAGE INPUT CONNECTIONS WITH TRANSDUCER POWER SUPPLY This connection can be used if the transducer power supply is configured ( see TERMINAL 3 CONFIGURATION). STATIC OUTPUTS CONNECTIONS V+ Be careful: this output is not isolated and may be used for an external solid state relay with double isolation between instrument and power line. RELAY CONNECTIONS Nc 11 10 I=5Amax 9 load ALARM CONCTACT (not available with “F” option) ME4018_11 10/11

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SERVOMOTOR CONNECTIONS valve closing valve supply valve opening TERMINAL 3 CONFIGURATION ( TRANSDUCER POWER SUPPLY ) Open the instrument and set the jumper JP2 for a PT100 input (standard) or for a transducer power supply connection. SERIAL OUTPUTS AND ANALOGUE OUTPUTS CONNECTIONS

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2.0 INSTALLATION NOTES 1. Copy the connection schemes on pages 6, 7 and 8 taking into account the following points: a- the instrument can operate with analogue inputs or temperature sensors of both thermoresistance and thermocoupling types. Only one of this sensors can be connected (attach the connection only for the chosen sensor, leaving free the other connections.). b- the connector diagram shows all the possible options that the instrument may have; if certain options are not required then the relative connections are not necessary. 2. Follow the instructions of the paragraph: 2.1: for heating...

Open the catalog to page 11

2.1.1 DIAGRAM MENU WITH HEATING OR COOLING CONTROL I 3 = number relevant to used table Search for the item to change, shown in the upper display using key The value to change is shown on the lower display. If you must change a number, use the key to increment the blinking digit, and thel_key to shift the blinking digit, and if you must select an item, use the To exit the menu, press the modified parameters will be stored.

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if requested analogue outputs tCOn = In for heating control tCOn = dIr for cooling control if requested serial outputs

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MPT91 M1 Table 3 ref. touch appears on appears on NOTES See key PV display SP display page enter PASS 0 000 In this phase the instrument asks for Pp 1 the Password in order to save the data 64 already programmed. The number memorized by the factory is 0, but any number between 0 and 9999 can be memorized by writing where CPAS appears (next displayed item). PASS 0 0 00 Set Up Procedure. 2 SP-4 To digit the desired number touch the key " SP-4" to move the flashing number to the right. PASS 0 1 00 3 SP+5 Touch the key " SP+5" to increase the flashing number enter CPAS 0 000 Number of the access...

Open the catalog to page 14

MPT91 M1 ref. touch appears on appears on key PV display SP display 8 NOTES "enter" Set the requested reading with the beginning of the analogue input. To digit the number see 2 and 3 paragraphs. Set the requested reading with the full scale of the analogue input. To digit the number see 2 and 3 paragraphs. Choose rISC for heating regulation with the main relay. Set the requested regulation by “SP+5” and confirm with “enter“. Lower limit set-point. To digit the number follow the procedure described in points 2 and 3 Upper limit set-point. To digit the number follow the procedure described in...

Open the catalog to page 15

MPT91 M1 ref. touch appears on appears on key PV display SP display Ramp/ Exit NOTES enabled after the first time the temperature reaches the alarm value To change this item use the “SP+5“ key and confirm by “enter” Alarm value set up (if requested). To digit the value see steps 2 and 3. An alarm can work as minimum alarm (if < set-point) or maximum alarm (if > set-point). Alarm 1 hysteresis set up Possibility of inverting the relay function nA = normally open nC = normally closed Set the requested regulation by “SP+5” and confirm with “enter“. If analogue outputs are requested touch the key...

Open the catalog to page 16

MPT91 M1

MPT91 M1

Catalog excerpts

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