Parker X-Flow Quick start guide

Page 2Instruction manual Parker X-Flow FM-1407 Rev -7/18
Attention
Please read this instruction manual carefully before
installing and operating the instrument.
Not following the guidelines could result in personal injury
and or damage to the equipment.
Even though care has been taken in the
preparation and publication of the contents
of this manual, we do not assume legal or
other liability for any inaccuracy, mistake,
misstatement or any other error of
whatsoever nature contained herein. The
material in this manual is for information
purposes only, and is subject to change
without notice.
Precision Fluidics Division
August 2018

Page 3Instruction manual Parker X-Flow FM-1407 Rev -7/18
TABLE OF CONTENTS
1General Product Information .................................................................................................4
1.1 Introduction ........................................................................................................................................ 4
1.2 Intended Use ...................................................................................................................................... 4
1.3 Symbols ............................................................................................................................................. 4
1.4 Product Support References ............................................................................................................. 4
1.5 Product Description ........................................................................................................................... 5
1.6 Operating Principles........................................................................................................................... 8
1.7 Maintenance....................................................................................................................................... 9
2Installation Instructions ............................................................. Error! Bookmark not defined.
2.1 Introduction ...................................................................................................................................... 10
2.2 Unpacking and inspection ............................................................................................................... 10
2.3 Rated pressure test inspection ........................................................................................................ 10
2.4 Instrument mounting ........................................................................................................................ 10
2.5 Fluidic connections .......................................................................................................................... 10
2.6 In-line filter usage............................................................................................................................. 11
2.7 Piping requirements ......................................................................................................................... 11
2.8 Electrical connections ...................................................................................................................... 11
2.9 Power and warm-up......................................................................................................................... 12
2.10 Pressure supply / Start-up ............................................................................................................... 12
2.11 System purging ................................................................................................................................ 12
2.12 Zeroing ............................................................................................................................................. 13
3Basic Operation....................................................................................................................14
3.1 General............................................................................................................................................. 14
3.2 Analog operation.............................................................................................................................. 14
3.3 Digital communication protocol detection (Flow-BUS RS232 or MODBUS® RS485 ................... 15
3.4 Basic RS232 Flowbus® operation................................................................................................... 15
3.5 Modbus® RS485 operation ............................................................................................................. 16
3.6 Push-button operation ..................................................................................................................... 24
3.7 Micro-switch use for reading/changing control mode..................................................................... 24
3.8 LED indications ................................................................................................................................ 25
3.9 Basic Parameters and Properties .................................................................................................... 26
3.10 Digital communication protocol detection (Flow-BUS RS232 or MODBUS® RS485Error! Bookmark not
defined.
4Advanced Operation.............................................................................................................29
4.1 Reading and Changing Instrument Parameters............................................................................... 29
4.2 Using other gasses than specified................................................................................................... 33
5Troubleshooting ................................................................................................................... 35
5.1 General............................................................................................................................................. 35
5.2 LED indications ................................................................................................................................ 35
5.3 The two LEDs on the instrument give information about the status of the instrument. Check chapter 3.7,
“Micro-switch use for reading/changing control mode............................................................................... 35
5.4 Troubleshooting summary general .................................................................................................. 36
6Service .................................................................................................................................. 37

Page 4Instruction manual Parker X-Flow FM-1407 Rev -7/18
1General Product Information
1.1 Introduction
This user guide covers the X-Flow™ mass flow controllers for gasses as shown in the pictures below.
Included is product information, installation instructions, operation, maintenance, troubleshooting and
technical specifications.
601XF
1.2 Intended Use
The intended use of X-Flow™ instruments is to control gas flow rates of the specified gas noted on the
instrument label. The gas must be clean.
The instruments can be used for either (fast) switching or controlling a constant flow rate.
1.3 Symbols
Important information. Discarding this information could cause injuries to people or damage to
the Instrument or installation.
Helpful information. This information will facilitate the use of this instrument.
Additional info available from the factory or your local sales representative.
1.4 Product Support References
Instructions:
Operating instructions digital instruments, document FM-1245.
RS232 interface with FLOW-BUS protocol, document FM-1249
Technical drawings:
Hook-up diagram X-Flow™, document FM-1409
X-Flow™ Dimensional drawing 601XF, document A-4539
X-Flow™ Transition Plate Dimensional drawing, document A-4540
All these documents are available at www.parker.com/precisionfluidics/X-Flow™
or by request to [e-mail].

Page 5Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.5 Product Description
1.5.1 General Description
An X-Flow™ mass flow controller consists of a thermal mass flow sensor, a laminar flow element which
acts as a bypass, a solenoid proportional control valve and a digital electronic PC-board for PID-
control and communication.
There is one model, 601XF, for flow rates from 40 ml/min to 20 l/min.
For simplicity, the standard X-Flow™ configuration is optimized to provide the best repeatable flow
measurement possible.

Page 6Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.5.2 Model Key
Example: 601XFFAAD00V
Gas: N2
Range: 90 ml/min
Analog output: 0-5Vdc
Seals: FKM
1.5.3 Seals
The instrument is fitted with FKM seals. It is the customer’s responsibility to ensure compatibility, there
is no liability for damages accruing from the use of this manual or other sources regarding
compatibility. Compatibility of seals with gasses can impact reliability of the instrument. The
customer’s application will demand its own specific design or test evaluation for optimum reliability.
Check if the seals like O-rings, plunger and packing gland of capillary are suitable for the used
gas and process.

Page 7Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.5.4 Calibration
X-Flow™ instruments are Nitrogen calibrated. X-Flow™ instruments are delivered with a Calibration
Certificate. Precision Fluidics certifies that all instruments meet the rated accuracy.
The calibration is converted to the customer’s gas and conditions using a detailed conversion model.
This conversion adds a level of calibration uncertainty described below.
Basic rule for calculating the conversion uncertainty is typical:
Uncertainty < 2% x CF for CF > 1
Uncertainty < 2% / CF for CF < 1
With CF defined as the approximate conversion factor, which can be calculated with:
2
1
2
1
ρ
ρ
⋅
⋅
=
p
p
C
C
CF
in which:
n
p
C
specific heat
n
ρ
density at normal conditions
(1) calibration fluid (N2)
(2) customer fluid
Contact the factory for more information.
1.5.5 Features
Each instrument consists of an Analog interface, a digital RS-232 interface and a digital
Modbus®/RS485 interface. The analog and the digital interface can be used together at the same time.
According to the pin-designation both RS232 and Modbus®/RS485 are assigned to the same pins.
When connecting these pins to either of the two, the instrument will automatically detect which
protocol to use.
Digital operation adds many extra features (compared to analog operation) to the instruments.
Such as:
•Setpoint slope (ramp function on setpoint for smooth control)
•Direct reading at readout/control module or host computer
•Several control/setpoint modes (e.g. purge/close valve)
•Identification (serial number, model number, device type, user tag)
•Adjustable controller settings for custom controller response

Page 8Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.6 Operating Principles
1.6.1 Thermal Gas Flow Sensor Principle
The gas flow sensor operates on a principle of heat transfer by sensing the temperature difference
along a heated section of a capillary tube. Part of the total flow is forced through the capillary by means
of a laminar flow element in the main stream generating a pressure difference.
The design of the laminar flow device is such that flow conditions in both the capillary and laminar flow
device are comparable, thereby resulting in proportional flow rates through the meter. The amount of
heat absorbed by the gas flow derives the delta-T sensed by the upstream and downstream
temperature sensors on the capillary.
The transfer function between gas mass flow and signal can be described by the equation:
mp
signal
cKV Φ⋅⋅=
Vsignal = output signal
K = constant factor
cp= specific heat
Φm= mass flow
The temperature sensors are part of a bridge circuit. The imbalance is linearized and amplified to the
desired signal level.
1.6.2 Bypass Principle
The measurement part of an X-Flow™ consists of a thermal sensor and a laminar flow element (LFE). A
laminar flow element consists of a stack of discs with precision etched flow channels. The flow through
each channel is proportional to the flow through the sensor. In this way, by adding more or fewer
laminar flow discs, the total flow rate of an instrument can be adjusted while using the same sensor
flow rate.
Example of a 50 ml/min measurement part

Page 9Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.6.3 Solenoid Valve Principle
The control valve used in the X-Flow™ series is a standard, direct operated control valve. It is a
normally closed solenoid valve. The plunger is lifted by the force of the magnetic field of the coil. The
diameter of the orifice under the plunger is optimised for the customer’s application.
Flow Control Valve
The control valve is not designed to provide positive shut-off. It is recommended to install a separate
shut-off valve in the line if so required. Also, pressure surges that may occur during system
pressurization must be avoided.
1.7 Maintenance
Periodic maintenance of your mass flow controller is recommended to optimize the performance
and to ensure prolonged use of the instrument. Because the nature of each application is different
(type of gas, running time, environment, etc.) the user of the device will need to determine the
frequency of recalibration and/or service of the instrument. An annual service that includes
inspection and recalibration is suggested if an existing maintenance schedule is not already in
place. Consider using the Parker Tracking System (PTS) for the management of your X-Flow™
mass flow controller. Each X-Flow™ mass flow controller has a unique PTS number assigned to
it. Using PTS helps provide the user with an online solution for keeping track of assets and can be
used as a reminder for upcoming service. Learn more about PTS at www.parker.com/pts.
Units may be flushed with clean, dry inert gas.
In case of severe contamination, it may be required to clean the inside of the instrument. After
cleaning, a recalibration is required. Contact [e-mail] for cleaning and recalibration
options.
Units may be sent back to the factory for service. Prior to sending the unit back an Authorization
to Return (ATR) is required. Please contact us at 800-525-2857 or [e-mail] for more
details about our service.
AUTHORIZATION TO RETURN POLICY
Authorization to Return (ATR): You must obtain an ATR number from the factory in order that we
may process your returned product. No material will be accepted for return without prior
authorization from the factory and an ATR number shown on all packages and accompanying
paperwork. All products returned must be free of any biological hazardous material and hazardous
chemicals. Return products will not be accepted after 60 days from issuance of the ATR number.
This policy has been set for our mutual protection in that it greatly reduces the possibility of
misplaced returns. For product purchased through a Parker Sales Company, Division, or Service
Center: You must obtain the ATR number from the location where you originally placed the
purchase order. Warranty & Non-Warranty Return Policy: Reference Parker Precision Fluidics
Division’s Terms & Conditions for specific details on Warranty Returns and Non-Warranty Returns.
Declaration of contamination form QA-415-D
If the equipment is not properly serviced, serious personal injury and/or damage to the equipment
could be the result. It is therefore important that servicing is performed by trained and qualified service
personnel.

Page 10 Instruction manual Parker X-Flow FM-1407 Rev -7/18
1.8 Introduction
This chapter discusses how to prepare the system and install a X-Flow™ mass flow controller.
1.9 Unpacking and inspection
Check the outside packing box for damage incurred during shipment. Should the packing box be
damaged, then the local carrier must be notified at once regarding his liability, if so required. At the
same time a report should be submitted to your Parker representative.
Carefully remove the equipment from the packing box. Verify that the equipment was not damaged
during shipment. Should the equipment be damaged, then the local carrier must be notified at once
regarding his liability, if so required. At the same time a report should be submitted to your Parker
representative.
Contact your local Parker representative or ppfi[email protected] for return information.
Before installing an X-Flow™, it is important to read the attached label and check:
- Flow rate
- Fluid to be measured
- Up- and downstream pressures
- Input/output signal (determined by the model code)
- Temperature
Inspect the X-Flow™ mass flow controller for damaged or missing parts.
1.10 Rated pressure test inspection
Each X-Flow™ is pressure tested to at least 1.5 times the working pressure of the process conditions
stipulated by the customer, with a minimum of 8 bar.
Each instrument is helium leak tested to at least 2⋅10-9 mbar l/s Helium outboard.
The tested pressure is stated on the flow controller model code sticker. Check test pressure
before installing in the line.
If the sticker is not available or the test pressure is incorrect, the instrument should not be
mounted in the process line and must be returned to the factory.
1.11 Instrument mounting
The bottom side of an X-Flow™ consists of four mounting holes for stable mechanical fixation of the
instrument. Two opposing mountings are suggested, one on the inlet and one on the outlet side of the
instrument. Refer to the following documents for exact position of the mounting holes:
Dimensional drawing 601XF, document A-4539 and Transition Plate dimensional drawing A-4540
The preferred mounting position of X-Flow™ mass flow controllers is horizontal. Other mounting
positions may introduce a zero shift and/or little gas and pressure dependency of the zero signal. When
mounting an instrument other than horizontal, zeroing of the instrument is advised. The zeroing
procedure is described in chapter 2.12.
Avoid installation near mechanical vibration and/or heat sources.
1.12 Fluidic connections
The inlet and outlet cavities/fluid connection ports of X-Flow™ instruments have 9/16-18 UNF-2B
(female) threads.
The instrument is shipped standard without fittings.

Page 11 Instruction manual Parker X-Flow FM-1407 Rev -7/18
Available fitting kits include:
•1/8” compression fitting with screen and O-ring, p/n B-1562-001V
•1/4” compression fitting with screen and O-ring, p/n B-1562-000V
•6 mm compression fitting with screen and O-ring, p/n B-1562-036V
Gas Connections
Each X-Flow™ mass flow controller has two (2) threaded process connection ports, one (1) located
at each end of the base block. One (1) serves as the gas inlet while the other is the gas outlet. Make
certain the tubing which mates to the fitting is correctly sized, clean and is seated against the
shoulder in the body of the compression fitting, prior to tightening the connection. Tighten the fitting’s
hex nut sufficiently to prevent leakage. Refer to the applicable fitting manufacturer’s data for specific
recommendations regarding installation and tightening. Test joints for leaks. The inlet and outlet
fittings contain a 325 mesh (44 micron) filter screen which prevents foreign matter from entering the
instrument.
Always check your system for leaks, before applying fluid pressure. Especially if toxic,
explosive or other dangerous fluids are used.
1.13 In-line filter usage
Fluids to be measured should be free of dirt, oil, moisture and other particles. Fluids that are heavily
contaminated or contain particulates are detrimental to precision. If liquid phases enter the sensor
chamber, the function of the sensor and the mass flow controller may be impaired.
It is recommended to install an in-line filter or liquid separator upstream of the flow controller, and if
backflow can occur, a downstream filter is recommended too. Be aware of the pressure drop caused
by the filter.
Contact [e-mail] for further information.
1.14 Piping requirements
Be sure that piping is clean!
DO NOT install small diameter piping on high flow rates, because the inlet jet flow will affect
the accuracy.
DO NOT mount abrupt angles direct on inlet and outlet, especially not on high flow rates,
allow at least 10 pipe diameters distance between the angle and the instrument is
recommended.
DO NOT mount pressure regulators directly on the inlet of gas flow controllers, allow at least
25 pipe diameters distance between regulator and gas flow controller inlet.
1.15 Electrical connections
1.15.1 Interface
X-Flow™ instruments can be operated by means of:
1. Analog interface (0...5Vdc or 4...20mA)
2. RS232 interface with FLOW-BUS protocol
3. RS485 interface with Modbus® protocol
All above operation options are standard available in X-Flow™ instruments.
According to the pin-designation both RS232 and RS485 are assigned to the same pins. When
connecting these pins to either of the two, the instrument will automatically detect which protocol to
use. When sending a frequent request to the instrument, it will be capable of recognizing the protocol,
once the instrument detects this protocol, it will send an answer.
The instrument will remember the detected protocol as long as the instrument is powered. This auto
detection cannot be switched off or by-passed.
For electrical hook-up diagrams refer to document FM-1409, “Hook-up X-Flow™”

Page 12 Instruction manual Parker X-Flow FM-1407 Rev -7/18
This document is available from the factory. Contact [e-mail] or
www.parker.com/precisionfluidics/x-flow
1.15.2 Power Supply
X-Flow™ controllers are powered with +15 Vdc to +24 Vdc.
When providing your own power supply be sure that voltage and current rating are according to the
specifications of the instrument(s) and furthermore that the source is capable of delivering enough
power to the instrument(s). Refer to Hook-up X-Flow™ , document no. FM-1409, for more details.
Parker recommends the use of their standard cables. These cables have the right connectors and if
loose ends are used, these will be marked to prevent wrong connection.
Parker Standard Cables available:
•C-700-002: 10 ft cable with connector and Flying Leads
•7.03.366: T-Cable (see section on software)
•C-1739-010: CM-400 Cable Connector
When using other cables, cable wire diameters should be sufficient to carry the supply current and
voltage losses must be kept as low as possible. When in doubt: contact the factory.
X-Flow™ instruments carry the CE-mark. Therefore, they comply with the EMC requirements as are
valid for these instruments. However, compliance with the EMC requirements is not possible without
the use of proper cables and connector/gland assemblies.
When connecting the system to other devices (e.g. to PLC), be sure that the integrity of the
shielding is not affected. Do not use unshielded wire terminals.
1.16 Power and warm-up
Before switching on power, check if all connections have been made according to the hook-up
diagram.
It is recommended to turn on power before applying pressure on the instrument and to switch off
power after removing pressure. Check fluid connections and make sure there is no leakage. If needed
purge the system with a proper fluid. Only purging with gases is allowed. Turn on power and allow at
least 30 minutes to warm up and stabilize for optimal accuracy. During warm-up period, fluid pressure
may either be on or off.
1.17 Pressure supply / Start-up
When applying pressure to the system, take care to avoid pressure shocks in the system and increase
pressure gradually up to the level of the actual operating conditions.
1.18 System purging
To eliminate contamination from foreign materials, start-up cleaning is highly
recommended prior to MFM/MFC installation Start-up cleaning must remove weld debris, tube
scale and any loose particulate generated during system fabrication.
If corrosive gases or reactive gases are to be used, the complete gas handling system must
be purged to remove all air before introducing process gas into the system. Purging can be
accomplished with dry nitrogen or other suitable inert gases.
Also, if it becomes necessary to break any gas connection exposing the gas handling system to
air, all traces of corrosive or reactive gas must be purged from the system before breaking the
connection.
Never allowing a corrosive or reactive process to mix with air reduces the chance of particulate or
precipitate formation in the gas handling system.
If explosive gases are to be used, purge the process with inert dry gas like Nitrogen, Argon etc. for at
least 30 minutes. In systems with corrosive or reactive fluids, purging with an inert gas is necessary,
!

Page 13 Instruction manual Parker X-Flow FM-1407 Rev -7/18
because if the tubing has been exposed to air, introducing these fluids will tend to clog up or corrode
the system due to a chemical reaction with oxygen or moist air. Complete purging is also required to
remove such fluids from the system before exposing the system to air. It is preferred not to expose the
system to air, when working with these corrosive fluids.
1.19 Zeroing
The zero point of each instrument is factory adjusted. However, the zero point may shift slightly due to
temperature, pressure, gas type and mounting position influences. If so required, the zero point of the
instrument may be re-adjusted.
Zeroing is possible over RS232 Flowbus®, RS485 Modbus® or by means of using the micro switch
button on top of unit. Zeroing by means of using the micro switch button on top of unit is described in
this manual.
•Warm-up, pressurize the system, and fill the instrument according to the process conditions.
•Make sure no flow is going through the instrument by closing valves near the instrument.
•The setpoint must be zero.
•Press the micro switch button on top of unit and hold it. After a short time the red LED will go ON
and OFF, then the green LED will go ON. At that moment release the micro switch button on top of
unit.
•The zeroing procedure will start at that moment and the green LED will blink fast. The zeroing
procedure waits for a stable signal and saves the zero. If the signal is not stable zeroing will take a
long time and the nearest point to zero is accepted. The procedure will take approx. 10 sec with a
stable signal.
•When the process is completed the green LED is on continuously.
For information how to start the zeroing procedure over RS232 Flowbus® or RS485 Modbus® check
chapter 4.1.4, “Auto Zeroing”

Page 14 Instruction manual Parker X-Flow FM-1407 Rev -7/18
2Basic Operation
2.1 General
An X-Flow™ instrument can be operated by means of:
•Analog interface (0...5Vdc/4...20mA)
•Digital RS232 Flowbus® interface (connected to COM-port by means of T cable (7.03.366) on
38400 Baud)
•Digital RS485 Modbus® interface.
Operation via analog or digital interface can be performed at the same time. A special parameter called
“control mode” indicates to which setpoint source the controller should respond.
2.2 Analog operation
At analog operation following signals are available:
•Measured value (analog output)
•Setpoint (analog input)
The type of installed analog interface (0-5V, 4-20mA) can be found in the model key of the instrument.
Refer to paragraph 1.5.2.
Setpoints below 2% of the full scale will be interpreted as 0% setpoint.
When operating the instrument through the analog interface it is possible to connect the
instrument simultaneously to RS232 or Modbus®/RS485 for reading/changing parameters
(e.g. controller response or other fluid selection).

Page 15 Instruction manual Parker X-Flow FM-1407 Rev -7/18
2.3 Digital communication protocol detection
(Flow-BUS RS232 or MODBUS® RS485
According to the pin-designation both RS232 and RS485 are assigned to the same pins.
At each power-on/off the X-Flow™ instrument the digital communication protocol from the master
(PLC/PC) must be detected by the X-Flow™ instrument. This auto detection cannot be switched off or
by-passed.
Description
At each power-on of the
X-Flow™ instrument a
protocol detection
routine is started and the
communication lines
switch each 110 ms
between RS232 FLOW-
BUS, RS485 Modbus®-
RTU and RS485
Modbus®-ASCII.
If received data is
recognized within the
particular time frame of a
protocol, then it will
immediately switch to
this protocol for 660 ms.
If a valid message is
received the instrument
will answer (reply) to this
message and stay in the
detected protocol.
The protocol is detected.
The instrument will
remember the detected
protocol as long as the
instrument is powered
on.
2.4 Basic RS232 Flowbus® operation
RS232 Flowbus® communication can be used for operating your instrument using the FlowDDE server
application. Dynamic Data Exchange (DDE) provides the user a basic level of inter-process
communication between Windows applications.
Physical layer and communication protocol are detected automatically upon reception of
messages. These messages must be sent using the correct combination of physical layer and
communication protocol. After every power-up the communication detection mode is active.
FlowDDE is a DDE server application. Together with a client-application, either self-made or with a
SCADA-program from 3rd-parties, it is possible to create an easy way of data exchange between the
flow controller and a Windows application.

Page 16 Instruction manual Parker X-Flow FM-1407 Rev -7/18
For example, a cell in Microsoft® Excel®® could be linked to the measured value of the flow controller
and when the measured value changes, it will be automatically updated in the Excel®® spreadsheet.
Examples of DDE client applications: FlowPlot, FlowView, MS-Office, LabView, Intouch, Wizcon.
The FlowDDE server also offers a lot of test facilities and user adjustable settings for efficient
communication with the connected flow controller.
How to setup a DDE link with FlowDDE is described in the help-file of the FlowDDE application.
Programming examples are available for making applications in: Visual Basic, LabView and Excel®®.
FlowDDE parameter numbers:
Reading/changing parameter values via FLowDDE offers the user a different interface to the instrument.
Besides the application name: ‘FLowDDE’ there is only need of:
•topic, used for channel number: ‘C(X)’
•item, used for parameter number: ‘P(Y)’
A DDE-parameter number is a unique number in a special FLowDDE instruments/parameter database
and not the same as the parameter number from the process on an instrument.
Node-address and process number will be translated by FlowDDE to a channel number.
FlowDDE and other Parker X-Flow™ applications are available from the factory.
A special RS232 cable (7.03.366) can be ordered separately. It consists of a T-part with 1 male
and 1 female sub-D 9 connector on one instrument-side and a normal female sub-D 9
connector on the side of the computer. By means of this cable it is possible to offer RS232
communication and still be able to connect power-supply and analog interface through the
(analog) sub-D 9 connector.
2.5 Modbus® RS485 operation
This chapter is limited to the description of the interface between the Modbus® Mass Flow Controller
with a master device. It will explain how to install an X-Flow™ instrument to your Modbus® system.
The implementation of the Modbus® interface is based on the following standards:
[1] MODBUS® Application Protocol Specification V1.1b, December 28, 2006
[2] MODBUS® over Serial Line specification and implementation guide V1.02
There is no mutual communication between Modbus® slaves; only between master and slave.
More detailed information about Modbus® can be found at http://www.Modbus®.org or any
website of the (local) Modbus® organization of your country (when available).
X-Flow
FlowDDE
server
Application 1
Application 2
Application n
RS232
DDE-link
DDE-link
DDE-link
Windows based Personal Computer
Instrument

Page 17 Instruction manual Parker X-Flow FM-1407 Rev -7/18
Physical layer and communication protocol are detected automatically upon reception of
messages. These messages must be sent using the correct combination of physical layer and
communication protocol. After every power-up the communication detection mode is active.
2.5.1 Slave address, baud rate and parity setup
Default instruments will be delivered to customers on address 1 and with a baud rate of 19200 baud
and EVEN parity.
The slave address, baud rate and parity of the X-Flow™ controller Modbus® slave can be changed to
fit the instrument in your existing Modbus® network. Changing the slave address, baud rate and parity
can be done in the following ways
Using RS232: FlowDDE
‘Off-line’ via the RS232 communication port by means of FlowDDE. This program can be used to
read/change parameters, including the slave address, baud rate and parity.
Connect your X-Flow™ controller Modbus® slave instrument to a free COM-port using the special
cable with on one side a T-part with male and female sub-D 9 connector and on the other side a female
sub-D 9 connector (part number 7.03.366). The single sub-D 9 connector should be connected to your
COM-port and the female sub-D 9 of the T-part to the male sub-D 9 of the instrument. Standard cables
are approx. 3 meters. Maximum length between PC and instrument allowed is approximately 10
meters.
Start FlowDDE and open communication via the menu (as shown below) or by pressing <F3>.
Once the DDE server is active, open the FlowDDE Test Form via the menu (as shown below) or by
pressing <F6>.

Page 18 Instruction manual Parker X-Flow FM-1407 Rev -7/18
The following screen appears:
To read/change the slave address, parameter 199: Bus address must be selected. To read/change the
baud rate, parameter 201: Baudrate must be selected. And to read/change the parity parameter 335:
Bus1 Parity must be selected. To change one of these parameters parameter 7: Initreset has to be set
to ‘64’ first.
Valid values for the slave address are between 1 and 247, valid values for the baud rate are 9600,
19200 and 38400, valid values for parity are 0 (= None), 1 (= Odd) and 2 (= Even). The changed values
will be effective immediately after changing.
Note: There are no hardware switches available on the X-Flow™ instruments for Slave address and
Baud rate setting.
Using micro-switch button and LEDs on top of the instrument
Readout bus-address/MAC-ID and baud rate:
Pressing the switch 3x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to “show” its bus-address/MAC-ID and baud rate.
For indication the bus-address/MAC-ID the green LED will flash the amount of tens and the red LED
the amount of units in the number. For indication of baud rate setting, both LEDs will flash.
The flashes are called “count-flashes” and have a pattern of 0.5 sec. on, 0.5 sec. off.
Table: LED indications for bus-address and baud rate
Green LED
Red LED
Time
Indication
amount of
count flashes
(0...12)
Off
0 ... 12 sec.
Maximum
tens in bus-address for instrument
Off
Amount of count
flashes
(0...9)
0 ... 9 sec.
Maximum
units in bus-address for instrument
amount of
count flashes
(1...3)
amount of count
flashes
(1...3)
1 ... 3 sec.
Maximum
baud rate setting for instrument
1 = 9600 Baud
2 = 19200 Baud
3 = 38400 Baud
Note: Value zero will be indicated by a period of 1 sec. off (0.5 sec. off + 0.5 sec. off).
Examples:
•For bus-address 35 / 9600 baud the green LED will flash 3 times, the red LED will flash 5 times and
both LEDs will flash 1 time.
•For bus-address 20 / 19200 baud the green LED will flash 2 times, the red LED will flash 0 times and
both LEDs will flash 2 times.
•For bus-address 3 / 38400 the green LED will flash 0 times, the red LED will flash 3 times and both
LEDs will flash 3 times.
Change bus-address/MAC-ID and baud rate:
Pressing the switch 5x briefly with intervals of max. 1 second in normal running/operation mode will
trigger the instrument to enter the bus configuration mode.
Within the time-out period of 60 sec. it is possible to start changing the bus-address/MAC-ID of the
instrument (see table below).

Page 19 Instruction manual Parker X-Flow FM-1407 Rev -7/18
Table 7: Procedure for changing bus-address and baud rate
Step
Action
Indication
time
handling
1
Set instrument
to
“bus config
mode”
both LEDs off
Press switch 5x briefly
2
Set tens of bus-
address
Green LED flashes
0.1 sec on,
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on,
0.5 sec off
time-out:
60 sec
Press switch and count green
flashes for tens of bus-address.
Release after desired count.
Counts up to max. 12 and then
starts at 0 again.
When counting fails, keep switch
pressed and restart counting for
next attempt.
3
Set units of bus-
Address
red LED flashes
0.1 sec on,
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on,
0.5 sec off
time-out:
60 sec
Press switch and count red
flashes for units of bus-
address/MAC-ID.
Release after desired count.
Counts up to max. 9 and then
starts at 0 again.
When counting failed, keep
switch pressed and restart
counting for next attempt.
4
Set baud rate of
field bus
communication.
1 = 9600 Baud
2 = 19200 Baud
3 = 38400 Baud
both red and green
LED flashes
0.1 sec on,
0.1 sec off
count-flashes
start when switch
is pressed:
0.5 sec on,
0.5 sec off
time-out:
60 sec
Press switch and count red and
green flashes for baud rate
setting.
Release after desired count.
Counts up to max. 3 and then
starts at 0 again.
When counting failed, keep
switch pressed and restart
counting for next attempt.
Note: selection of 0 means: No
change
Instrument returns to normal running/operation mode.
Changes are valid when they are made within the time-out times.
Actual setting can be checked by pressing the switch 3x briefly with intervals of max. 1 sec. for readout
the bus-address/MAC-ID and baud rate.
Note 1:
Value zero will be indicated by a period of 1 sec. off (0.5 sec. off + 0.5 sec. off).
When value zero is wanted, press switch shortly and release it again within 1 sec.
Note 2:
Before each action of flash-counting, the LED(s) to be used for counting will flash in a high frequency.
(Pattern: 0.1 sec on, 0.1 sec off). As soon as the switch is pressed-down, this LED (or both LEDs) will
be off and the counting sequence will start.
Note 3:
The parity setting cannot be read or changed using the micro-switch.
2.5.2 Implementation class
The physical and data link layer is implemented conforming to the "basic slave" implementation class
as described in document [2], “MODBUS® over Serial Line specification and implementation
guide V1.02”. The following options have been implemented:
Parameter
Options
Remarks
Addressing
address configurable from 1 to
247 (default 1)
see section 3.5.1
broadcast
support
Yes

Page 20 Instruction manual Parker X-Flow FM-1407 Rev -7/18
More detailed information about Modbus® can be found at http://www.Modbus®.org or any
website of the (local) Modbus® organization of your country (where available).
2.5.3 Response time
This slave device will respond on each valid request from the master within 100 msec. This means that
the response timeout setting of the master should be set to a value larger than or equal to 100 ms.
2.5.4 Supported Modbus® functions
This section describes the supported Modbus® function codes. Refer to document [1] “MODBUS®
Application Protocol Specification V1.1b, December 28, 2006” for more details.
More detailed information about Modbus® can be found at http://www.Modbus®.org or any
website of the (local) Modbus® organization of your country (where available).
Read Holding Registers (03)
Possible exception responses:
•02, ILLEGAL DATA ADDRESS, in case of reading of non-existing address, or reading a part of a
multiregister parameter (float, long, etc)
•03, ILLEGAL DATA VALUE, in case of reading less than 1 or more than 125 registers
•04, SLAVE DEVICE FAILURE, in case of reading a write-only register
The maximum message size for the Read Holding Registers function is 100 bytes at 9600
baud (200 bytes at 19200 baud and 400 bytes at 38400 baud). When this size is exceeded,
corrupted responses may be received.
Write Single Register (06)
Possible exception responses:
•02, ILLEGAL DATA ADDRESS, in case of writing to non-existing address, or writing to a part of a
multiregister parameter (float, long, etc)
•04, SLAVE DEVICE FAILURE, in case of writing to read-only register
•04, SLAVE DEVICE FAILURE, in case of writing illegal value to register
Write Multiple Registers (16)
Possible exception responses:
•02, ILLEGAL DATA ADDRESS, in case of writing to non-existing address, or writing to a part of a
multiregister parameter (float, long, etc)
•03, ILLEGAL DATA VALUE, in case of reading less than 1 or more than 123 registers
•04, SLAVE DEVICE FAILURE, in case of writing to read-only register
•04, SLAVE DEVICE FAILURE, in case of writing illegal value to register
When one of the written registers raises an exception, the value written to all subsequent registers are
discarded (ignored).
Diagnostics (08)
The following sub-functions are supported:
Sub-function code
(dec)
Name
00
Return Query Data
!
baud rate
9600, 19200 (default), 38400
see section 3.5.1
parity
None, Odd, Even (default)
see section 3.5.1
transmission
mode
RTU/ASCII
Auto detection
data bits
RTU=8, ASCII=7
not configurable
electrical interface
RS485 2W-cabling
See document:
FM1263 - Hook-up diagram Series II B
(Basic)
connector type
DB9 Male
See document:
FM1263 - Hook-up diagram Series II B
(Basic)