Dataradio INTEGRA-H User manual

INTEGRA
H Version
TechnicalManual

INTEGRA-H
Copyright 2000 by DATARADIOCOR Ltd.
Part Number: 001-4090-101/102
Revision 0
September 2000
DATARADIOCOR Ltd. designs and manufactures radios and radio modems to serve a wide variety of data communication
needs. DATARADIOproduces equipment for the fixed data market including SCADA systems for utilities, petrochemical,
waste and fresh water management markets and RF boards for OEM applications in the Radio Frequency Data Capture
market.
PRODUCT WARRANTY
The manufacturer's warranty statement for this product is available from DATARADIOCOR, Ltd. 299 Johnson Avenue,
Box 1733, Waseca, MN 56093-0833. Phone [phone].
The information in this document is subject to change without notice.
is a trademark of DATARADIO,Inc.

SECTION 1
1-1
001-4090-101/102
PRODUCT OVERVIEW
1.1 SCOPE OF MANUAL
This document provides information required for the operation and preventive maintenance of the
DATARADIOCOR Ltd. Integra-H Spread Spectrum Radiomodem. This manual is intended for system designers,
professional installers and maintenance technicians
1.2 GENERAL DESCRIPTION
Integra-H is a high-speed protocol transparent radiomodem. It is designed specifically to fit the needs of
Supervisory Control and Data Acquisition (SCADA), telemetry and control applications. Integra-H provides the
communication links to data equipment for installations where wired communication is impractical.
Integra-H will work with most makes and models of remote terminal units (RTU) and programmable logic
controllers (PLC) and their protocols. Configuration settings allow tailoring for a variety of application
requirements.
Integra-H supports:
1. Point to point configuration in switched simplex mode
2. Point to multipoint configuration
Settings and connections for these configurations are given later in this manual
1.2.1 CHARACTERISTICS
Integra-H has the following characteristics:
lSelectable network speeds of 9600, 19200, 21400, and 25600 b/s
lOne COM port for connection to DTE. Speed of 300 - 19200 baud
lOne Setup port, for configuration and diagnostics output (speed fixed to 9600 baud, 8 bit, (unlicensed
frequency hopping band) no parity, 1 stop bit
lBuilt-in 0.1 - 1-watt transceiver, operating in the 902-928 MHz communications bands
lFully transparent operation with error-free data delivery (no “dribble bits”)
lAllows transmission of “break” characters
lDOX (Data Operated Transmit) or RTS mode
lTwo 8-bit analog inputs (0 - 10V)
lLow power consumption modes: “sleep” and “suspend” modes (< 20 mA)
l“13.3 VDC, negative ground” device

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1.2.2 ACCESSORIES AND OPTIONS
For information on accessories and options, contact your sales representative. In the United States phone
1-800-992-774. For international sales, phone [phone] or 1-305-829-4030.
1.2.3 CONFIGURATION
Operating characteristics of the Integra-H are configured by means of Integra-H Radio Service Software
(INTRSS). The RSS/RDS software kit also includes the Radio Diagnostic Software (INTDIAG), which permits
both local and remote diagnostics. These programs are Win/95 or later based (16 Megabytes of memory required).
Integra-H requires the use of INTRSS for both configuration and adjustment.
1.3 FACTORY TECHNICAL SERVICE
The Technical Service Department provides customer assistance on technical problems and serves as an
interface with factory repair facilities. They can be reached in the following ways:
Dataradio COR Ltd.
299 Johnson Avenue, P.O. Box 1733
Waseca, MN 56093-0833
Technical Service hours are: Monday to Friday 7:30 AM to 4:30 PM, Central Time
Phone: [phone]
1-507-835-6408 or 1-507-835-8819
Fax:[phone]
Email address: [email protected]
1.4 PRODUCT WARRANTY
The warranty statement for the Integra-H is available by contacting your sales representative. DRL
warranties are included in .pdf format on CD versions of DATARADIOtechnical manuals.
Table 1-1 Integra-H Accessories and Options
Accessory DRL Part Number
Local RSS & RDS software kit (diskette and setup/data cable) 023-4090-005
SMA Male - BNC Female adapter cable 023-3410-098
Power cable 732-03273-001 (DRI p/n)

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1.5 REPLACEMENT PARTS
This product is normally not field-serviceable, except by the replacement of complete units. Specialized
equipment and training is required to repair logic boards and radio modules.
Contact Technical Service for information before returning equipment. A Technical Service
representative may suggest a solution eliminating the need to return equipment.
1.6 FACTORY REPAIR
Dataradio products are designed for long life and failure-free operation. If a problem arises, factory
service is available. Contact the Technical Service Department before returning equipment. A service
representative may suggest a solution eliminating the need to return equipment.
A Return Material Authorization (RMA) is required when returning equipment to Dataradio for repair.
Contact the Technical Service Department at 800-992-7774, extension 6290 to request an RMA number. Be
prepared to give the equipment model and serial number, your account number (if known), and billing and
shipping addresses.
Include the RMA number, a complete description of the problem, and the name and phone number of a
contact person with the returned units. This information is important. The technician may have questions that need
to be answered to identify the problem and repair the equipment. The RMA number helps locate your equipment
in the repair lab if there is a need to contact Dataradio concerning the equipment. Units sent in for repair will be
returned to the customer re-tuned to the current Dataradio Test and Tune Procedure and will conform to all
specifications noted in this section
Customers are responsible for shipping charges (to Dataradio) for returned units in warranty. Units in
warranty are repaired free of charge unless there is evidence of abuse or damage beyond the terms of the warranty.
Dataradio covers return shipping costs for equipment repaired while under warranty.
Units out of warranty are subject to repair service charges. Customers are responsible for shipping charges
(to and from Dataradio) on units out of warranty. Return shipping instructions are the responsibility of the
customer.
1.7 PHYSICAL DESCRIPTION
Integra-H consists of a logic PCB (which includes modem circuitry) and a radio module. Each logic PCB
and radio module are matched together and characterized in the factory to optimize performance as an intelligent
unit. The two boards then slide into the rails of an extruded aluminum case.
The Integra-H transceiver “hops” from channel to channel several times per second using a “hop” pattern
applied to the master and remotes in a network. A distinct hopping pattern is provided for each of the available
network addresses. This distinct pattern minimizes the chance of interference with other spread spectrum
networks. In the United States (and certain other countries), no license is necessary to install and operate this type
of spread spectrum system.
DTE connection is made via a front panel connector. Power is applied through a rear panel 4-pin
connector which includes two programmable analog connections usable as inputs or specialized outputs.

PRODUCT OVERVIEW
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Part No. 001-4090-101/102
The unit is not hermetically sealed and should be mounted in a suitable enclosure when dust and/or a
corrosive atmosphere are anticipated. Physically, there are no external switches or adjustments. All operating
parameters are set using the INTRSS software program.
1.8 DIAGNOSTICS
Integra-H has sophisticated built-in diagnostics that may be transmitted automatically without interfering
with normal network operation. In addition, commands to generate test transmissions, etc., may be issued either
locally or remotely.
Diagnostic information takes one of two forms:
Online diagnostics Information is automatically sent by each unit at the beginning of every data
transmission. Online diagnostics are available via the setup port or INTDIAG software.
Offline diagnostics Information is sent by a specific unit in response to an inquiry made locally or from
another station. Off
1.9 FIRMWARE UPGRADES
The Integra-H firmware resides in flash EPROM and is designed to allow field upgrades.
Upgrades are done using a PC connected to the Integra-H but do not require opening the unit. Upgrades
require interaction with DRL’s Technical Service.
1.10 INSTALLATION
1.10.1 PROFESSIONAL INSTALLATION REQUIRED
The Integra-H complies with Part 15 of the FCC rules and must be professionally installed. Operation
must conform to the following conditions
lThis device may not cause interference
lThis device must accept any interference including interference that may cause undesired operation of
the device
The installer of this equipment must ensure the antenna is located or pointed such that it does not emit
RF field in excess of Health Canada limits for the general population; consult Safety Code 6 (available from
Health Canada).
1.10.2 ANTENNA CONNECTION
This equipment has been tested and approved with antennae having a maximum gain of 10 dB. Antennae
with a higher gain are strictly prohibited (regulations of Industry Canada). The required antenna impedance is 50
ohms. To reduce potential radio interference, the antenna type and its gain should be chosen to ensure the
equivalent isotropically radiated power (EIRP) is not more than required for successful communication.

PRODUCT OVERVIEW
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Part No. 001-4090-101/102
FCC/IC Rule: The output power is not to exceed 1.0 watt and the EIRP not to exceed 6 dBW if the hopset
uses 50 or more frequencies. A sample calculation is provided below.
Sample Calculation: Yagi Antenna: 10 dB Exceeds 6 dBi gain by 4 dB
Cable Loss: 1 dB
Integra-H output must be reduced by 4 dB (plus 1 dB to account for cable loss)
30 dBm - 4 dB + 1 dB (cable loss) = 27 dBm at antenna port of Integra-H
after 1 dB loss through cable: 27 dBm - 1 dB = 26 dBm input to antenna
Result: reduction of 4 dB
Figure 1-1 Sample Equation Graphic
1.10.3 ACCEPTABLE ANTENNAE
The antennae listed in Table 1-2 were tested and typed for maximum gain. These antennae are FCC
approved for use with the Integra-H. Table 1-2 Acceptable Antennae
1.10.4 SAFETY NOTICE
The Integra-H uses low power radio frequency transmitters. The concentrated
energy from an antenna may pose a health hazard. People should not be in front of
the antenna when the transmitter is operating.
Type Manufacturer Part Number Gain (dBi)
Yagi Maxrad MYG9159 10
Omni Directional Maxrad MFB9157 7
Unity Gain Maxrad MFB9150 0
Whip Maxrad EXE-902-SM or
EXR-902-BN 0
10 dBm gain Yagi
ERIP = 36 dBm 26 dBm
27 dBm

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1.11 NETWORK APPLICATION
Integra-H is suited to a variety of network applications. Its primary design goal satisfies the needs of
SCADA systems using RTUs, PLCs, or other similar equipment in either point-to-point or point-to-multipoint
service.
This section gives an overview of some common configurations. Selection of “master” or “remote” as
well as data delivery conditions is done using INTRSS.
1.11.1 RF PATH AND COMMUNICATIONS RANGE
Integra-H is designed for use over distances dependent on terrain and antenna system. To assure reliable
communications, the RF (radio frequency) path between stations should be studied by a competent professional
who can determine what antennae are required and whether or not a repeater is needed.
1.11.2 BASIC CONNECTIONS
The connections required are shown in Figure 1-2.
While an RTU or PLC is shown in the diagram, master stations often use a PC running an application
designed to communicate with remote RTUs or PLCs.
The Setup PC is used for both configuration and local and remote diagnostics. It may be left connected at
all times but is not required for normal operation once the unit has been configured.
Figure 1-2 Basic Required Connections
13.3VDC / 2A
Regulated power supply
connects on rear

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1.11.3 COMMON CHARACTERISTICS
The networks described in this section share common characteristics:
1.The network speed (9600, 19200, 21400, and 25600 b/s) must be the same for all stations in a network.
2.Transmission of online diagnostics may be enabled or disabled at any station or stations without
affecting their ability to communicate with other stations.
1.11.4 POINT-TO-POINT SYSTEM
A simple point-to-point connection is shown in Figure 1-3.
Figure 1-3 Point-to-Point System
In this system, the user's equipment (DTE) is set up in a master-remote configuration.
1.11.5 POINT-MULTIPOINT SYSTEM
Basic point-multipoint systems are shown in Figure 1-4:
Figure 1-4 Point-Multipoint System
Using the Integra-H programming software, one Integra-H must be set to “master”. The remaining units in
the network must be set to “remote”. All units are set to “selective” data delivery to prevent remote stations from
hearing each other's responses.
remote
remote
remote
Master
(simplex or half-duplex)

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1.11.6 EXTENDING A LANDLINE (TAIL CIRCUIT)
Integra-H may be used to extend a landline circuit (giving access to difficult locations, etc.). This type of
connection is called a “tail circuit” and is shown in Figure 1-5. The tail circuit assembly may be used in any of the
network types described in the preceding sections.
Figure 1-5 Landline (Tail Circuit)
Note: The phone-line modems should be full duplex units.
Figure 1-6 DCE Crossover Cable for RTS-CTS mode
Some point-to-point FDX landline modems or line drivers may require the use of DOX mode and an
alternate pinout for DTR, DCD, CTS and RTS as shown in Figure 1-8.
Figure 1-7 DCE Crossover Cable for DOX mode
Integra-H
1
2
3
4
5
6
7
8
9
DE-9M
7
3
2
8
5
1
4
DE-9M
D
C
D
RXD
TXD
DTR
GND
RTS
CTS
R
T
S
TXD
RXD
CTS
GND
DCD
DTR
3
2
5
2
3
5
TXD RXD
RXD TXD
GND GND

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Figure 1-8 Point-Multipoint Using a Store and Forward Device
Figure 1-9 Point-Multipoint (Repeater)
Master
Store and Forward Device
Integra-H
Integra-H
Remote
Remote
Remote
Integra-H Integra-H
Integra-H
Integra-H
RS-232 Serial
RS-232 Serial
Data line harness (RS232 Serial)
Master
Integra-H Integra-H
AB
Remote
Remote
Remote
Integra-H Integra-H
Integra-H
Integra-H
Hop Sequence 2
Hop Sequence 1

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GENERAL SPECIFICATIONS
These specifications are subject to change without notice.
*psophometrically weighted
GENERAL
Frequency 902-928 MHz
Controlled Channel Access Interference avoidance system Carrier Sense or Active Channel monitoring for dynamic channel
usage
IF Channel Steps: 50 kHz for systems
IF Channel Bandwidth 30 kHz (Minimum 512 channels @ 900 MHz)
Operating Temperature -30° to + 60° C
Supply voltage 10 - 16 VDC maximum
Receive Current 200 ma
Transmit Current 650 ma
Standby Current 20 ma
Data Format Asynchronous 7 and 8 bit words
User Data Rates 19200, 21400, 25600 baud
Data Protocol Transparent to user data
Nominal Dimensions 4.5" W x 2.2" H x 4.75" D (11.4 x 5.6 x 12.1 cm)
RECEIVER
Sensitivity 10-6 BER @ -105 dBm @ 9600 bps
Intermodulation 75 dB
Spurious Rejection 80
Conducted Spurious 70
Secondary Image 65 dB
TRANSMITTER
RF Power Output .100 -1 Watt, software adjustable
Spurious and Harmonics
Frequency Stability 1.5 ppm
Output Impedance 50 ohms
Maximum SWR Stable over 10 to 1
Tx Duty Cycle 100% unlimited Tx time
Modem / Logic
Operation Switched Simplex
Data Bit Rates 25 kHz channel: 19200, 21400, 25600 baud
Modulation Type DRCMSK (Differential Raise-Cosine Minimum Shift Keying)
RTS/CTS Delay (RTS mode) 4 ms
Addressing 8 bit station address, 1 bit station type (master / remote)
Bit Error Rate (BER)
9600 b/s, 12.5 kHz
9600 and 4800 b/s, 25 kHz
19200 b/s, 25 kHz
1 x 10 -6 at 1.4 µV minimum /-104 dBm
1 x 10 -6 at 1.0 µV minimum / -107 dBm
1 x 10 -6 at 2.3 µV minimum / -100 dBm
COM Port
Interface EIA RS-232C
Data Rate 300 - 19200 b/s
Protocol Transparent, 7 or 8 data bits, 1 or 2 stop bits, even, odd or no parity
Transmit Control RTS or DOX (data operated transmit)

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Setup/Diag Port
Data Format Proprietary binary for setup, ASCII for diagnostics
Data Rate 9600 b/s, 8 bit, no parity, 1 stop bit
Analog Inputs
Interface Two inputs, 0-10 VDC, 8 bits. May be read only via offline diagnostics.
Absolute maximum input voltage < 20 Vdc. Inputs are reverse-voltage protected.
Display
4 Bi-color status LEDs RUN/PWR/ CS/SYN, RX/TX, RD/TD
Connectors
RF SMA Female
COM DE-9F
SETUP/DIAG DE-9F
Power/Analog Snap & Lock 4-Pin DC Power Jack
Diagnostics
Online Short ID, temperature, B+ voltage, local RSSI, remote RSSI, fwd and rev power, Rx
Quality
Offline As for Online plus: Demodulated Signal Voltage, Analog Input Levels

SECTION 2
2-1
001-4090-101/102
FEATURES AND OPERATION
2.1 OVERVIEW
This chapter describes the connections, indicators, and operating characteristics of the Integra-H.
This chapter is intended for system application and installation personnel.
2.2 FRONT PANEL
The various front panel elements are described in the following sections.
Figure 2-1 Integra-H Front Panel
2.2.1 ANTENNA CONNECTOR
Antenna connector is a female 50-ohm SMA- type. The Integra-H is designed to operate with an
antenna having a maximum gain of 10 dB. Antennae with a higher gain are strictly prohibited (FCC &
Industry Canada). Required antenna impedance is 50 ohms. The installer of this equipment must ensure
the antenna does not emit an RF field in excess of Health Canada limits for the general population
(Safety Code 6 available from Health Canada).
2.2.2 RF EXPOSURE COMPLIANCE REQUIREMENTS
The Integra-H is intended for use in the SCADA market. It must be mounted within a fixed RTU.
The Integra-H must be professionally installed to ensure a minimum separation distance of more than 20
cm is maintained between the radiating structure and any person. Typical installation is the antenna
mounted on a tower. (In rare instances, a 1/2 wave whip antenna is used.) In these installations, the
antenna is mounted greater than the minimum distance of 20 cm.

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2.2.3 SAFETY NOTICE
The Integra-H uses low power radio frequency transmitters. The concentrated energy
from an antenna may pose a health hazard. People should not be in front of the antenna
when the transmitter is operating.
2.2.4 LED INDICATORS
Integra-H has four two-color LED indicators. Their functions are shown in Table 2-1.
Table 2-1 LED Color Functions
* Contact technical support.
2.2.5 CONNECTION TO DTE
Integra-H is configured as DCE. Most DTE should be connected using a nine-conductor pin-to-
pin “straight” cable. Some RTUs or PLCs may require a special cable to route the signals correctly. See
the documentation for your data equipment for further information.
2.2.6 COM PORT
Baud rates from 300 to 19200 are supported. Integra's are factory set (default) for 9600 b/s, 8 bits,
no parity, and 1 stop bit. Unless required by your operating protocol, we advise restricting port speed to
be equal to or less than the RF network speed.
RUN/PWR Green Normal operation
Flash green Sleep mode (flashes during wakeup)
Flash red & green Setup mode or loading new application or new bootloader
Flash red Firmware error*
Red CPU or PROM failure*
CS/SYN Off No RF RX carrier
Green Receive carrier present
Red (Reserved)
RX/TX Off No RF RX carrier
Green Receiving network data
Yellow Synthesizer unlocked
Red Transmitter is on
RD/TD Off Idle
Green RX data outgoing from RS-232 port
Red TX data incoming at RS-232 port

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Table 2-2 COM Port Signals
2.2.4.1 Connector Pin out
The DE-9F pin out is shown in Figure 2.2 for reference.
Figure 2-2 COM and Setup Port Connectors Pin Locations
2.2.4.2 Wire Connection (DOX)
For DTE that lack RTS control, Integra-H can operate in DOX mode (Data Operated
Transmit) with only Transmit Data, Receive Data and Ground (“3-wire interface”).
Figure 2-3 3-Wire Interface
Pin Name Function
1DCD Output: Always asserted or asserted when receive RF carrier present (selectable via RSS)
2RXD Output: Data from Integra-H to DTE
3TXD Input: Data from DTE to Integra-H
4DTR Input: Ignored
5GND Signal and chassis ground
6DSR Output: always positive
7RTS Input: Used as a “begin transmission” signal in RTS mode
Will “wake up” unit in sleep mode
8CTS Output: Used for handshaking in RTS mode and used for flow control in DOX mode
RTS mode: RTS to CTS delay in 4 ms
DOX mode: CTS always asserted except when data overflow is detected
9RI Not internally connected, reserved
12345
6789
1
2
3
4
5
6
7
8
9
R
X
D
TXD
GND
DE-9
M

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2.2.7 SETUP PORT
The Setup port uses a DE-9 female connector configured as DCE. Signals are described
Table 2-4. Table 2-3 Setup Port Signals
The Setup port uses a proprietary communications protocol designed to work with the Integra-H
RSS and RDS programs. It is also designed to provide numeric diagnostics information when connected
to a PC terminal emulator. (See section 2.5.1.2 for diagnostics format.)
2.3 REAR PANEL
Figure 2-4 Integra-H rear panel
2.3.1 HEAT SINK
The rear panel heat sink is essential for proper operation of the Integra-H transmitter. The unit
must be mounted in a location that permits free air circulation past the heat sink. Cooling will be best if
the fins are vertical.
Pin Name Function
1DCD Tied directly to DTR
2RXD Data from Integra-H to setup PC
3TXD Data from setup PC to Integra-H
4DTR Tied directly to DCD
5GND Signal and chassis ground
6DSR Output: always positive (asserted)
7RTS Tied to CTS. Also monitored to “wake up” unit from sleep mode
8CTS Tied to RTS
9RI Not internally connected, reserved

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2.3.2 POWER
The Integra-H power requires a regulated power source of 13.3 VDC nominal (10 - 16 VDC
max.) negative ground with a minimum 2.0 A rating. An internal surface-mount 3A modem fuse (not
field-replaceable) and a crowbar diode protect the main RF power components from reverse polarity.
Application of more than 16 VDC will damage the unit and is not covered by the warranty.
WARNING: Do not exceed 16Vdc.
2.3.3 POWER / ANALOG CONNECTOR
The 4-pin power / analog connector pin out is shown in Figure 2-5.
Figure 2-5 Power / Analog Connector
Note: The color of the power cable wires are shown in parenthesis. If the analog connections are
not used the green and white wires should be cut back and/or taped to prevent contact. (See Table 1-1 for
power cable part number)
2.3.4 ANALOG CONNECTIONS
The two analog connections can be programmed as inputs (monitoring) or as outputs.
2.3.4.1 Analog Inputs
Voltage inputs are scaled between 0 and 10 VDC and have a resolution of eight bits (1 part
in 256). Monitoring inputs, measured in tenths of a volt, are referenced to chassis ground.
The absolute maximum input voltage should not exceed 20 VDC. These inputs are reverse-
voltage protected. Integra-H allows reading the analog values, locally or remotely, using the
Offline Diagnostics function of the Radio Diagnostics Software (RDS) program. To use an
analog connection as input, ensure that the required input box is checked in the RSS program
under Settings / Analog Connector.
+13.3 VDC (1)
(2) GND
Analog 1 (3) (4) Analog 2 /
RX-TP
(red) (black)
(white)
(green)

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2.3.4.2 Analog outputs
To use an analog connection as output, be sure to check the appropriate box (in the RSS program
under Settings/Analog Connector):
1. Analog 1 (green)
a. Input (or)
b. Fan Control
With the Fan Control selected, the output signal regulates fan operation. It is factory set
for all units equipped with the cooling option. The temperature-controlled open-
collector transistor is rated 100 mA maximum.The unit’s internal thresholds are set for
ON ≈48º C and OFF at ≈38º C.
2. Analog 2 (white)
a. Input
The following two selections depend on hardware configuration and should not be changed in the
field.
b. Rx-Tp
With the Rx-Tp selected, the output signal performs as the receiver demodulated audio
signal test point (Rx-Tp). The Rx-Tp should measure 1 V p-p.
c. Antenna SW
Tx = Low
Rx = Open
With the Antenna Switch Control selected, the output is an open collector transistor rated at 100
mA max. The output signal supports the use of a redundant (HSB) base.
2.4 OPERATION
Integra-H is designed for fully transparent operation. This means that all binary values are
transmitted as data with minimum time delays and without regard to their binary value. “Break” signals
can also be transmitted. Unlike most transparent radiomodems, Integra-H eliminates “bit dribble” and
allows DOX operation. A CRC-16 error check is used so that faulty data will not be delivered.

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2.4.1 OPERATING MODES
Integra-H has two operating modes for its COM port: (selectable via the RSS program)
DOX mode: The RS-232 port is monitored for incoming data. Upon receipt of the first data
byte, the transmitter is turned on. The RTS signal is ignored (Note: RTS may still be used as a wakeup
signal for a unit that is asleep).
RTS mode: The RTS signal is monitored for a low-to-high transition. This transition causes
Integra-H to turn on its transmitter. CTS is raised 4 ms later to accommodate DTE that requires a CTS
transition before it can send data. The transmission will continue until RTS is dropped or until the Tx
Time out (see section 2.8) expires.
CTS is used as a handshaking/flow control signal in both modes. If the Integra-H’s buffers fill,
CTS will be dropped as a signal to the DTE to stop sending data. This condition is most likely when the
Data port speed exceeds the radio network speed. In such cases, reduce the DTE baud rate so that
Integra-H buffers will not fill.
2.4.2 DATA FORWARDING TIMER
The data forwarding timer can modify the timing between data blocks in a transmission to
accommodate some RTU's special timing requirements. Set to “normal” (15 ms) unless advised
otherwise by technical support. Do not use “fast” (5 ms) timer below 2400 baud.
2.4.3 SENDING BREAK SIGNALS
Integra-H may be configured to send “break” signals, as required by some SCADA user
protocols. A break signal is generated by holding TXD in the zero state for longer than one character
time. Indication of a break signal is carried in a special data transmission to the remote station, which in
turn generates its own output break signal.
At a port speed of 19200 b/s, the output break signal has a duration of 5 to 10 ms, regardless of
the duration of the input break signal. These times are scaled proportionally for other baud rates. Integra-
H may also be set to ignore “break” signals in order to prevent spurious transmissions when terminal
equipment is powered on and off.
2.4.4 COM PORT BAUD RATES
The COM port operates at standard baud rates from 300 to 19200 b/s. Baud rate is set using the
Integra RSS and is independent of the network speed setting.
We recommend that the COM port baud rate be set to a speed less than the network speed.
Setting a COM port baud rate higher than the network rate may result in data buffers filling, which in
turn may cause Integra-H to drop CTS. This could have detrimental effects on some protocols,
particularly those that ignore CTS.