IMP Pumps NMTC module User Manual
NMTC module
Functional profile and user manual
preliminary, 7340055, v4
2
3
Contents
WARNING!
comply with local regulations.
WARNING!
properly instructed and supervised. Children must not be allowed to play with this product.
6.1 Bus topology ...................................21
6.2 Connecting to pump ad-hoc with a
cross over cable .........................................22
1 Symbols and conventions used in this
document ........................................................4
1.1 Abbreviations and conventions .........4
2 Introduction.............................................5
2.1 System diagram ................................5
2.2 Specifications ...................................5
3 Module layout .........................................7
3.1 Connection considerations ...............8
3.2 Connecting the module wiring ..........9
3.3 Connection examples ..................... 11
4 Control modes and priorities ................. 12
4.1 Priority of settings .......................... 12
4.2 Control variables............................. 13
4.3 Module mode selection .................. 13
4.4 Mode 1 ........................................... 14
4.4.1 Digital (switch) control ............ 15
6.3 Connecting to pump via router .......26
6.4 Pump configuration over Ethernet ..27
7 Modbus .................................................31
7.1 Modbus related interface ...............31
7.2 Bus topology ...................................31
7.3 Connection to Modbus ...................32
7.4 Speed, parity and address ...............32
7.5 Termination ....................................32
7.6 Register block overview ..................33
7.7 NMTC Configuration register block .33
7.8 NMTC Status register block .............34
7.9 Pump control register block ............34
7.10 Pump status register block ..............36
7.11 Pump data register block ................38
7.12 Modbus telegrams and function
codes 39
4.4.2 Analog control ........................ 17
4.5 Mode 2 ........................................... 18
5 Relay output .......................................... 20
6 Ethernet................................................. 21
Prior to installation and commissioning, read these instructions first. Installation and operation must
Installation and use of this product requires experience and knowledge of this or similar products.
Persons with reduced physical, mental or sensory capabilities must not use this product, unless
8 Fault finding ...........................................39
8.1 Error codes .....................................39
8.2 Communication faults .....................41
4
1 Symbols and conventions used in this document
WARNING!
to the user.
Abbreviation
Description
Baud, Baud rate
Serial communication speed, in bits per second including start, parity and stop bits.
CRC
Cyclic Redundancy Check, additional bytes used to confirm valid data transmission.
Ethernet
IEEE 802.3, mostly referring to 10BASE-T RJ-45 connector present on board.
H
Differential pressure, often called Head.
LED
Light Emitting Diode.
Modbus
A serial communication protocol used for device automation and remote access.
NMTC
NMT pump Communication module.
Q
Pump flow or flow rate.
RTU
Remote Terminal Unit.
RS-485
Multi drop serial network wiring, used to transfer Modbus data.
Denotes that a failure to observe those instructions might cause damage to equipment or pose danger
NOTE: - Gives additional tips or instructions that might ease the job and ensure proper operation.
1.1 Abbreviations and conventions
For Modbus use, this manual assumes that the reader is familiar with commissioning and configuring of
Modbus devices. It is also assumed that an existing Modbus RTU network on RS-485 wiring with
Modbus master is present.
For Ethernet and web interface use, this manual assumes that the reader knows how to configure or
already has preconfigured Ethernet network.
For use of analog signals and relay output signals, external controller needs to be configured and used.
Proper operating mode must also be selected for the module.
NOTE:
• Data in this document are subject to change.
• Actual implementation might differ by pump model and software revision.
• Make sure you are using the right manual for your product.
• Verify proper operation in the final system.
• Manufacturer cannot be held responsible for problems caused either directly or indirectly by
the use of information in this manual.
5
2 Introduction
<95 % relative, noncondensing
Also see appropriate pump data for other
ambient specifications.
Power supply and
connection
5V@500mA supplied
by the pump
on/off + 0..10V + relay output
Modbus RTU + Relay output
Ethernet + on/off + 0..10V
Modbus RTU + Ethernet
Ethernet + on/off + relay output
This manual describes the NMTC module for NMT range of pumps that is either integrated or separately
available. This module is used for various remote control applications, including:
• Remote on/off
• Analog 0..10V voltage control
• Modbus remote control
• Status relay feedback
• Web access over Ethernet
It is suitable for medium size NMT pumps, 90-440W of rated power.
2.1 System diagram
There are several possible connection configurations. Not all functions can be used simultaneously.
…
2.2 Specifications
The table below is an overview of NMTC specifications. For details, please refer to appropriate
sections of this manual.
General data
Ambient humidity
Dimensions [∅ x H]
112 mm x 32 (45) mm Dimensions without glands.
6-pin connector further extended for display.
6
Modbus specifications
2+1 pins. See section 7.3 “
Connection to
Modbus
”.
Modbus connection
type
Modbus wire
configuration
Conductors: A, B and COM (Common).
See section 7.3 “
Connection to Modbus
”.
Communication
transceiver
Integrated, 1/8 of
standard load
Maximum cable
length
Default is 245, settable over Modbus. See
section 7.4 “
Speed, parity and address
”.
Line termination is not integrated. For low
externally on both ends.
1 stop bit minimum, up to 2 when parity not
enabled [default=1]
Modbus visual
diagnostics
Flashing yellow when data reception detected.
Combined (OR) with Ethernet ACT function.
Maximum number of
Modbus devices
Limited by possible Modbus addresses to 247.
1/8 nominal load enables 256 devices.
Maximum Modbus
packet size
Common ground
SET2 and SET3.
-
Web server (port 80)
-
Optional Modbus RTU over TCP/IP
Slowly blinking when module is powered,
permanently lid when link established.
Flashing yellow when data reception detected.
indication.
Data protocol Modbus RTU
Modbus connector Screwless terminals
RS-485
Two-wire + common
Connect either via passive taps or daisy chain.
1200 m See section 7.5 “
Slave address 1-247
Line termination Not present
Supported
transmission speeds
Start bit 1 Fixed.
Data bits 8 Fixed.
Stop bits 1 or 2
Parity bit Even/odd/none [default=Even]
1200, 2400, 4800,
9600, 19200, 38400
baud
LED2
247
speed/short distance, termination can be
omitted. Otherwise, terminate the line
Settable over Modbus register [default=19200].
Termination
”.
256 bytes Including address (1) and CRC (2) bytes.
Isolation
Ethernet specifications
Ethernet connector RJ-45 10BASE-T, 10Mbit/s connection.
Connection type and
services
Default IP address 192.168.0.245 192.168.0.246 for right twin pump.
Ethernet visual
diagnostics
(COM) with SET1,
-
Firmware update over web interface
LED1 / LINK
LED2 / ACT
Modbus shares common ground with other
signals.
Combined (OR) with Modbus data reception
7
Mode selection switch
Position read at power-on.
configuration reset.
Output voltage
range
When used as output. 5mA max. load allowed
per output.
Output current sink
range
- 230 VAC, 3 A, AC1
-
32 VDC, 3 A
Modbus signal
SET3 / FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
RS-485
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
2
1
3
4
5
6
7
8
9
0
MAX
RUN
ALARM
Adjustment
10 position rotary
switch
Used for relay configuration and module
Analog signals (SET1, SET2, SET3)
Input voltage range -1..32VDC When used as input.
0..12V
Input resistance ~100k 0.5mA load is added for most configurations.
0..33mA (4-20mA) Current sink to COM if configured as output.
Relay specifications
Connection type Screwless terminals
Rating
Potential free changeover contact.
3 Module layout
Figure 1: Typical module connection
8
Terminal
Designation
MODE
Mode selection rotary switch. Used to configure mode of operation for the circuit. See
section 4.3 “Module mode selection”.
Slowly blinking when module is powered.
Permanently lid when Ethernet link established.
Ethernet
10BASE-T RJ-45 connector.
LED2 / ACT
Indicates Ethernet activity or Modbus activity.
B/D-
RS-485 negative data signal for Modbus.
A/D+
RS-485 positive data signal for Modbus.
SET1 / RUN
Control signal 1.
COM / 0V
RS-485 common and analog input common (ground).
SET2 / MAX
Control signal 2.
SET3 / FB
Control signal 3.
NC
Normally closed relay contact. Opens when relay is active.
C
Relay common contact.
NO / OK
Normally open relay contact. Closes when relay is active.
WARNING!
preparation” below.
Cabling preparation
max. 15
mm
8(7-
10)mm
0.
25 - 1 mm
2
Tools
2.4mm wide flat-bladed screwdriver is
Mode switch.
Description
LED1 / LINK
Blinking fast when Modbus Error
3.1 Connection considerations
• All cables connected must be heat-resistant to at least +85°C.
• All cables connected must be installed in accordance with EN 60204-1.
• All wires to the communications module must be connected to the terminals or cut. No loose wiring
permitted.
• If voltages over 24VAC/DC are possible on NO, C, NC terminals:
• Wires should be routed so no wire crosses the center barrier.
• Relay cable (NO, C, NC) must be separated from all other wiring with reinforced
insulation. Cable outer layer must not be stripped longer than 15mm. See “Cabling
Cable for the screwless terminals should
be prepared as shown on the left.
needed to press the terminal spring
while inserting the cable.
Same tool is also used to rotate the
9
Opening the cover
WARNING!
switched on.
1.
1.
2.
3.
3.2 Connecting the module wiring
Before performing any work on
the module, make sure that the
pump and module electricity
supply has been switched off and
that it cannot be accidently
1) Press two top hooks on the display
panel. Use flat tip screwdriver if
needed.
2) Simultaneously pull display panel away
from the pump.
3) Disconnect display panel cable to ease
access to the module wiring. Wiring can
now be connected.
10
Closing the cover
WARNING!
Before performing any work on the
cannot be accidently switched on.
5.
4.
module, make sure that the pump
and module electricity supply has
been switched off and that it
4) Reconnect display panel cable.
5) Make sure that the position tab and
position slot are aligned.
11
Closing the cover
Default (factory) configuration
SET3/
FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
RS-
485
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
2
1
3
4
5
6
7
8
9
0
6.
7.
3.3 Connection examples
6) Make sure that the hooks are aligned.
7) Push the display back to the NMTC
module.
12
Relay and Modbus connection
Modbus signal
SET3 / FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
RS-485
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
2
1
3
4
5
6
7
8
9
0
MAXRUN
ALARM
Relay and Ethernet connection
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A
/D +
B/D -
NC
C
NO
RS
-485
LED2 / ACT
LED1
/ LINK
ETHERNET
MODE
2
1
3
4
5
6
7
8
9
0
inlet and then crimped to a connector.
NOTE: To maintain pump IP protection, the
network cable should be pulled through the gland
4 Control modes and priorities
4.1 Priority of settings
Several signals will influence the pump operation. For this reason, settings have priorities as shown in
the table below. If two or more functions are active at the same time, the one with highest priority will
take precedence.
13
Priority
Pump control panel &
Ethernet settings
1
Stop (OFF)
2 Night mode active2
3
Max. RPM (Hi)
4 Min. curve4
5
Stop (Run not active)
6
Max. curve4
Stop3
7 Setpoint setting4
Setpoint setting3
8
Setpoint setting4
Symbol
Regulation mode
Module setpoint controls:
-
(Web interface only)
A
External signals1
Modbus control
Examples:
• Stop on the pump display panel will stop the pump, regardless of external setpoint.
• If External Run input is inactive, the pump cannot be started over Modbus, but can be set to max
RPM on the display panel.
4.2 Control variables
Pump will respond to external controls according to selected pump operating mode. Consult proper
pump operating manual for explanation.
Auto mode
Proportional pressure Maximum head
Constant pressure Maximum head
Constant speed
Free5
Night mode6
4.3 Module mode selection
-
(RUN only)
Speed
(RPM)
-
(RUN only)
1
Not all inputs are available in all modes.
2
External and Modbus Stop signals become active in night mode. Due to possible confusion, use of night mode is
discouraged while using external control.
3
Only available when pump is bus controlled.
4
Not available when pump is bus controlled.
5
Multiple limits can be set. Not available on all pumps.
6
Night mode is not independent regulation mode.
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