SNOOPER MODEL PD865
MODBUS
®
SERIAL INPUT
Instruction Manual
Modbus® RTU Master, Slave, or Snooper Mode
6-Digit Display, 0.56" (14 mm) High, Red LEDs, Sunlight Readable
Linear, Square Root, or Programmable Exponent
16-Point Linearization
Maximum/Minimum Display
Type 4X, NEMA 4X, IP65 Front
Universal Power Supply 85-265 VAC
12-36 VDC/12-24 VAC Power Option
2 or 4 Relays + 4-20 mA Output Options
24 VDC Transmitter Power Supply Option
RS-485 Serial Communications
Proxy Polling for up to 8 Process Variables
PRECISION DIGITAL CORPORATION
89 October Hill Road • Holliston, MA 01746 USA
Tel (800) 343-1001 • Fax (508) 655-8990
www.predig.com
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Disclaimer
The information contained in this document is subject to change
without notice. Precision Digital makes no representations or
warranties with respect to the contents hereof; and specifically
disclaim any implied warranties of merchantability or fitness for a
particular purpose.
!
CAUTION: Read complete
instructions prior to
installation and operation
of the meter.
Warning
This product is not recommended for life support applications or
applications where malfunctioning could result in personal injury or
property loss. Anyone using this product for such applications does
so at his/her own risk. Precision Digital Corporation shall not be held
liable for damages resulting from such improper use.
Limited Warranty
Precision Digital Corporation warrants this product against defects in
material or workmanship for the specified period under
“Specifications” from the date of shipment from the factory. Precision
Digital’s liability under this limited warranty shall not exceed the
purchase value, repair, or replacement of the defective unit.
Registered Trademarks
All trademarks mentioned in this document are the property of their
respective owners.
©2010-2012 Precision Digital Corporation. All rights reserved.
WARNING: Risk of
electric shock or
personal injury.
www.predig.com
2
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Table of Contents
INTRODUCTION ------------------------------------------------------------------------------------ 6
ORDERING INFORMATION -------------------------------------------------------------------- 6
SPECIFICATIONS --------------------------------------------------------------------------------- 7
General ------------------------------------------------------------------------------- 7
Operating Modes ----------------------------------------------------------------- 8
Programmable Features for Master Mode -------------------------------- 9
Serial Communications --------------------------------------------------------- 9
Display Functions -------------------------------------------------------------- 10
Relays ------------------------------------------------------------------------------ 11
Isolated 4-20 mA Transmitter Output ------------------------------------ 12
COMPLIANCE INFORMATION -------------------------------------------------------------- 13
Safety ------------------------------------------------------------------------------- 13
SAFETY INFORMATION ----------------------------------------------------------------------- 13
INSTALLATION ----------------------------------------------------------------------------------- 14
Unpacking ------------------------------------------------------------------------- 14
Panel Mounting ------------------------------------------------------------------ 14
MOUNTING DIMENSIONS -------------------------------------------------------------------- 15
Connections ---------------------------------------------------------------------- 16
Connector Labeling ---------------------------------------------------------- 16
Power Connections ---------------------------------------------------------- 17
Serial Connections ----------------------------------------------------------- 18
Relay Connections ----------------------------------------------------------- 19
Switching Inductive Loads -------------------------------------------------- 19
4-20 mA Output Connections ---------------------------------------------- 21
SETUP AND PROGRAMMING --------------------------------------------------------------- 22
Front Panel Buttons and Status LED Indicators --------------------- 23
Display Functions and Messages ----------------------------------------- 24
Main Menu ------------------------------------------------------------------------ 29
Setting Numeric Values ------------------------------------------------------ 29
Meter Setup ----------------------------------------------------------------------- 30
Operating Modes (nmode) ---------------------------------------------------- 30
Master Mode (nmastr) ------------------------------------------------------ 31
Proxy Polling Mode ---------------------------------------------------------- 32
Slave Mode (Slave) --------------------------------------------------------- 34
Snooper Mode (Snoopr) ---------------------------------------------------- 35
Serial Communications (SEriAL) ----------------------------------------- 36
Program Menu (Prog) ------------------------------------------------------- 36
Setting the Display Decimal Point (disp..dp) --------------------------- 37
3
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Setting the Float Decimal Point (Flot..dp) ------------------------------ 37
Scaling the Display Value (scale) --------------------------------------- 38
Setting the Relay Operation (relay) ------------------------------------ 39
Relay and Alarm Operation ------------------------------------------------ 42
Scaling the 4-20 mA Analog Output (Aout) ---------------------------- 49
Setting Up the Password (pass) ------------------------------------------- 50
Locking the Meter ------------------------------------------------------------ 50
Unlocking the Meter ---------------------------------------------------------- 51
Advanced Features Menu ---------------------------------------------------- 52
Advanced Features Menu & Display Messages ---------------------- 53
Display Math Function (func) --------------------------------------------- 54
Noise Filter (filter) -------------------------------------------------------- 55
Noise Filter Bypass (bypass) ---------------------------------------------- 55
Low-Flow Cutoff (CutofF) -------------------------------------------------- 55
Analog Output Programming (aoutpr) ---------------------------------- 56
4-20 mA Output Calibration ------------------------------------------------ 57
Display Intensity (d-inty) -------------------------------------------------- 58
Information (info) ------------------------------------------------------------ 58
OPERATION --------------------------------------------------------------------------------------- 59
Master and Slave Connections -------------------------------------------- 59
Maximum/Minimum Readings ---------------------------------------------- 62
TROUBLESHOOTING -------------------------------------------------------------------------- 63
Determining Software Version --------------------------------------------- 63
Reset Meter to Factory Defaults ------------------------------------------- 63
Factory Defaults & User Settings ----------------------------------------- 64
Troubleshooting Tips --------------------------------------------------------- 68
SLAVE MODE REGISTER TABLE ---------------------------------------------------------- 69
Register Table Notes ---------------------------------------------------------- 79
Register Bit Assignment Tables ------------------------------------------- 81
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Table of Figures
Figure 1: Panel Cutout and Mounting ............................................... 14
Figure 2: Meter Dimensions – Side View .......................................... 15
Figure 3: Case Dimensions – Top View ............................................ 15
Figure 4: Connector Label: 4 Relays, 4-20 mA Out & 24 V Supply 16
Figure 5: Power Connections ............................................................ 17
Figure 6: RS-485 Connection ............................................................ 18
Figure 7: Standard and Optional Relay Connectors........................ 19
Figure 8: AC and DC Loads Protection ............................................ 19
Figure 9: Low Voltage DC Loads Protection .................................... 20
Figure 10: 4-20 mA Output Powered by Meter ................................. 21
Figure 11: 4-20 mA Output Powered Externally ............................... 21
Figure 12: PD865 Slave & Snooper Connected to a Master ............ 59
Figure 13: PD865 Master Connected to a Smart Sensor & Chart
Recorder .............................................................................................. 59
Figure 14: PD865 Master Connected to a PD765 Meter ................... 60
Figure 15: PD865 Master & Snoopers Connected to Multivariable
Level Transmitters ............................................................................. 60
Figure 16: PD865 Master & Snoopers Connected to Level and
Temperature Sensors......................................................................... 61
5
PD865 Snooper Modbus Serial Input Meter Instruction Manual
INTRODUCTION
The PD865 Snooper Modbus Serial Input Meter can be programmed as a
Modbus RTU Master, Slave, or Snooper. As a Master, the PD865 reads a
slave device, scales the data from it, displays the result, and operates the
internal relays and 4-20 mA output. The PD865 Master mode is capable of
polling up to 8 process variables (Proxy polling feature); it displays PV1 and
allows other PD865s in Snooper mode to read any of the variables being
polled by the Master. As a Slave, it is controlled by a master device. The
data sent to it by the master is scaled, displayed, and used to operate the
relays and 4-20 mA output. As a Snooper the PD865 listens to the Modbus
traffic and picks up a specific register or registers being polled by a Master
device from a specific slave device and processes the data being read.
The PD865 Snooper is housed in a shallow-depth 1/8 DIN panel meter
enclosure that features a NEMA 4X front panel. Data is displayed on an
adjustable intensity, six-digit seven-segment LED display. The Snooper can
be powered from 85-265 VAC or 12-36 VDC. It comes standard with 2
relays and is available with 2 additional relays and 4-20 mA output as
options.
ORDERING INFORMATION
85-265 VAC*
Model
PD865-6R2-06 2 relays
PD865-6R5-16
PD865-6R7-16
PD865-7R5-06 2 relays, 4-20 mA output
PD865-7R7-06 4 relays, 4-20 mA output
*All models may be powered from AC or DC. See Specifications for details.
Accessories
Model Description
PDA7485-I RS-232 to RS-422/485 Isolated Converter
PDA7485-N RS-232 to RS-422/485 Non-Isolated Converter
PDA8485-I USB to RS-422/485 Isolated Converter
PDA8485-N USB to RS-422/485 Non-Isolated Converter
PDX6901 Suppressor (snubber): 0.01 µF/470Ω, 250 VAC
Enclosures
**Enclosures available for 1-10 meters. Visit our website for details.
12-36 VDC*
Model
NEMA 4 & explosion-proof enclosures**
Plastic, steel, stainless steel & cast aluminum
Installed
2 relays, 4-20 mA output/24 V
transmitter supply
4 relays, 4-20 mA output/24 V
transmitter supply
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
General
Input/Output Modbus RTU over RS-485
DISPLAY Six digits, 0.56" (14 mm) high, red LED. Displays from
DISPLAY
UPDATE RATE
OVERRANGE Values greater than the highest Input value programmed
UNDERRANGE Values less than the Input 1 value cause the display to
PROGRAMMING
METHODS
RECALIBRATION Only required for the 4-20 mA output. Calibrated at the
MAX/MIN
DISPLAY
PASSWORD Programmable password restricts modification of
NON-VOLATILE
MEMORY
POWER AC: 85-265 VAC, 50/60 Hz
REQUIRED FUSE
ISOLATED
TRANSMITTER
POWER SUPPLY
ISOLATION 4 kV input/output-to- powe r line
-199999 to 999999, automatic leading zero blanking.
Master: 10/second to once every 25.5 seconds
Slave/Snooper: Dependent on master device (e.g. PLC)
cause the display to flash
-199999
flash
Four front panel buttons, or via Modbus registers.
factory. Recalibration is recommended at least every
12 months.
Max/min readings are stored until reset by the user or
when power to the meter is turned off. User can reset by
front panel pushbuttons or via Modbus registers.
programmed settings.
All programmed settings are stored in non-volatile memory
for a minimum of ten years, with or without power.
DC: 90-265 VDC
Optional: 12-36 VDC, 12-24 VAC
999999
Model Watts
PD865-6R2-06 6
PD865-6R5-16 8
PD865-6R7-16 15
PD865-7R5-06 10
PD865-7R7-06 10
UL Recognized, 5 A max, slow-blow; up to 6 meters
may share one fuse.
One transmitter power supply (Optional)
24 VDC 10% @ 200 mA max. (-1 option)
500 V input-to-output or output-to-24 VDC supply
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
ENVIRONMENTAL Operating temperature range: -40 to 65°C
CONNECTIONS Removable screw terminal blocks accept 12 to 22 AWG
ENCLOSURE 1/8 DIN, high impact plastic,
MOUNTING 1/8 DIN panel cutout required. Two panel mounting
TIGHTENING
TORQUE
OVERALL
DIMENSIONS
WEIGHT 8.0 oz (227 g) (2 relays)
WARRANTY 3 years parts and labor
Storage temperature range: -40 to 85°C
Relative humidity: 0 to 90% non-condensing
wire.
UL 94V-0, color: gray
bracket assemblies provided
Screw terminal connectors: 4.5 lb-in (0.5 Nm)
2.45" x 4.68" x 4.19" (62 mm x 119 mm x 106 mm)
(H x W x D)
9.7 oz (275 g) (4 relays, 4-20mA Output & 24 V supply)
Operating Modes
MASTER Processes data read from a Modbus RTU slave device
SLAVE Processes data sent to it from a Modbus RTU master
SNOOPER Listens to the Modbus traffic and picks up a specific register
(only one process variable at a time can be displayed on
the master).
Proxy polling feature: Polls up to 8 process variables from
up to 8 slave devices. The Master processes and displays
PV1 and allows other PD865s in Snooper mode to read any
of the variables being polled.
device.
or registers being polled by a Master device from a specific
slave device and processes the data being read.
Note: The relays and the 4-20 mA output are functional in
all modes.
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Programmable Features for Master Mode
FUNCTION CODE Select which Modbus function code (03 or 04) to use in
NUMBER
OF PVs
SLAVE ID Assign the slave ID or address (1-247) containing the
REGISTER
NUMBER
DATA TYPE Select the data format that the slave device uses. Select
POLL TIME 0.1 to 25.5 sec. Time between read-commands (Master
SLAVE
RESPONSE
TIMEOUT
reading the slave device.
Select the number of process variables to be polled by the
Master (PV1-PV8).
process variables to be displayed (Slave ID for PV1-8).
5 digit: 30001-39999 or 40001-49999
6 digit: 300001-365536 or 400001-465536
Specifies which register(s) to read in the slave device.
Range is dependent on Function Code selection (04 or 03)
and digits selection (5 or 6).
PV2-PV8: Select 1 register for Short integer or 2 registers
for Long integer and Floating point data types.
between Short integer (2 byte) and Long integer (4 byte) or
floating point (4 byte), Signed or Unsigned (integer only)
and byte order (big-endian vs. little-endian).
mode) or listening-time window (Snooper mode).
0 to 25.4 seconds X3 (76.2 sec). Time allowed for the slave
to respond to a command. Programming 0 disables the
timeout. This setting is used by Master and Slave modes.
Serial Communications
SLAVE ID
OR ADDRESS
BAUD RATE 300 – 19,200 bps
DATA 8 bit (1 start bit, 1 or 2 stop bits)
PARITY None, even, or odd. 1 or 2 stop bits selectable for None.
BYTE-TO-BYTE
TIMEOUT
TURN AROUND
DELAY
1 – 247. Specifies the ID or address of the slave device
(Master or Snooper mode) or the address of the PD865
(Slave mode).
0.01 – 2.54 seconds
Less than 2 ms (fixed)
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Display Functions
INTENSITY 1 to 8. To optimize viewing based on ambient lighting
DISPLAY
DECIMAL POINT
FLOAT
DECIMAL POINT
MATH
FUNCTIONS
MULTIPOINT
SCALING
NOISE FILTER Programmable from 2 to 199 (0 will disable filter)
BYPASS 0.2 to 99.9% of full-scale.
CUTOFF
conditions.
Up to five decimal places:
ddd . ddd,
Select the number of decimals to use for the floating point
data expected from the slave or master device (this is
independent from the display decimal point selection).
Linear, square root, or programmable exponent (0.50000
to 2.99999).
2 to 16 points.
0 to 999999. 0 disables cutoff.
dddd . dd, ddddd .d, or dddddd
d . ddddd, dd .dddd,
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Relays
RATING Standard: 2 relays, SPST (Form A)
ELECTRICAL
NOISE
SUPPRESSION
DEADBAND 0-100% of full scale, user selectable
HIGH OR LOW
ALARM
RELAY
OPERATION
RELAY RESET User selectable via front panel buttons or Modbus control
Automatic reset only (non-latching)
TIME DELAY 0 to 199 seconds, on and off delays
FAIL-SAFE
OPERATION
COMMUNICATIONS BREAK
AUTO
INITIALIZATION
Fail-safe operation: relay coil is energized in non-alarm condition. In case of
power failure, relay will go to alarm state.
Optional: 2 relays, SPDT (Form C)
All relays are rated 3 A @ 30 VDC or 3 A @ 250 VAC,
resistive loads.
A suppressor (snubber) should be connected to each relay
contact switching inductive loads to prevent disruption to
the microprocessor’s operation. Recommended suppressor
value: 0.01 µF/470 , 250 VAC (PDX6901).
User may program any alarm for high or low trip point.
Automatic (non-latching)
Latching
Pump alternation control (up to 4 relays)
Automatic + manual reset at any time (non-lat ching)
Manual reset only, at any time (latching)
Manual reset only after alarm condition has cleared (latching)
Automatic reset: Relays will automatically reset when the
input passes the reset point.
Manual reset: Front panel ACK button. Pressing ACK
resets all manually resettable relays.
Programmable and independent for each relay
Programmable
Independent for each relay
No change, Relay on, or Relay off.
Controls the condition the relay goes to when a slave
device does not reply (Available also in Slave mode v1.1 &
up).
When power is applied to the meter, relays will reflect the
state of the input to the meter.
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Isolated 4-20 mA Transmitter Output
CALIBRATION Factory calibrated for 4-20 mA
SCALING RANGE 1.000 to 23.000 mA for any display range.
ACCURACY ± 0.1% F.S. ± 0.004 mA
TEMPERATURE
DRIFT
EXTERNAL LOOP
POWER SUPPLY
OUTPUT LOOP
RESISTANCE
24 VDC
35 VDC (external)
DATA
SOURCE
OVERRANGE Programmable mA output for overrange condition.
UNDERRANGE Programmable mA output for underrange condition.
COMMUNICA-
TIONS BREAK
MAXIMUM
OUTPUT
MINIMUM
OUTPUT
Reverse scaling allowed.
50 PPM/C from 0 to 65C ambient
35 VDC maximum
Power supply Minimum Maximum
10 700
100 1200
Display Value, Maximum Display Value, Minimum Display
Value, or Modbus Register.
Programmable mA output when a slave device does not
reply within the Slave Response Timeout (Available also in
Slave mode v1.1 & up).
Programmable absolute maximum mA output desired.
Programmable absolute minimum mA output desired.
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
COMPLIANCE INFORMATION
Safety
UL LISTED USA and Canada
UL FILE NUMBER E160849
FRONT PANEL UL Type 4X, NEMA 4X, IP65; panel gasket provided
UL 508 Industrial Control Equipment
SAFETY INFORMATION
Warning!
!
CAUTION: Read complete
instructions prior to
installation and operation
of the meter.
Hazardous voltages exist within enclosure.
Installation and service should be performed only by
trained service personnel.
13
WARNING: Risk of
electric shock or
personal injury.
PD865 Snooper Modbus Serial Input Meter Instruction Manual
INSTALLATION
There is no need to remove the meter from its case to
complete the installation, wiring, and setup of the meter.
Unpacking
Remove the meter from box. Inspect the packaging and
contents for damage. Report damages, if any, to the carrier.
If any part is missing or the meter malfunctions, please contact
your supplier or the factory for assistance.
Panel Mounting
Prepare a standard 1/8 DIN panel cutout – 3.622" x 1.772" (92 mm
x 45 mm). Refer to Figure 1 for more details.
Clearance: allow at least 4" (102 mm) behind the panel for wiring.
Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).
Recommended minimum panel thickness to maintain Type 4X
rating: 0.06" (1.5 mm) steel panel, 0.16" (4.1 mm) plastic panel.
Remove the two mounting brackets provided with the meter (back-off
the two screws so that there is ¼" (6.4 mm) or less through the
bracket. Slide the bracket toward the front of the case and remove).
Insert meter into the panel cutout.
Install mounting brackets and tighten the screws against the panel.
To achieve a proper seal, tighten the mounting bracket screws
evenly until meter is snug to the panel along its short side. DO NOT
OVER TIGHTEN, as the rear of the panel may be damaged.
Figure 1: Panel Cutout and Mounting
14
PD865 Snooper Modbus Serial Input Meter Instruction Manual
MOUNTING DIMENSIONS
Figure 2: Meter Dimensions – Side View
865SideViewDim
Figure 3: Case Dimensions – Top View
15
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Connections
All connections are made to removable screw terminal connectors
located at the rear of the meter.
Use copper wire with 60°C or 60/75°C insulation
for all line voltage connections. Observe all
safety regulations. Electrical wiring should be
!
Caution!
Connector Labeling
The connectors’ label, affixed to the meter, shows the location of all
connectors available with requested configuration.
performed in accordance with all applicable
national, state, and local codes to prevent
damage to the meter and ensure personnel
safety.
Figure 4: Connector Label: 4 Relays,
4-20 mA Out & 24 V Supply
16
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Power Connections
Power connections are made to a two-te rminal co nnecto r labeled
POWER in Figure 2. The meter will operate reg ardless of DC pola rity
connection. The + and - symbols are only a suggested wiring con ven tion.
POWER CONNECTOR
1
2
+-
Recommended External
Fuse: 1 A, 250 V Slow Blow
Figure 5: Power Connections
AC or DC
POWER
17
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Serial Connections
The PD865 is connected to an RS-485 bus with up to 32 nodes. For
systems consisting of more than 32 nodes, RS-485 repeaters are
necessary. Wiring connections to the PD865 are made via the three
position screw terminal connector labeled RS-485. Please refer to the
EIA-485 standard for complete specifications for balanced digital multipoint communications. The use of shielded twisted pair cable is
recommended to protect the data signals from electrical interference.
For long wire runs it is good practice to terminate the bus at both ends
with a resistor connected between D+ and D- that matches the
characteristic impedance of the cable. A typical termination resistor
value is 120 Ω.
RS-485 Connector
D+ D- G
1 2 3
Data +
Data Common
Shield
Twisted-Pair
Figure 6: RS-485 Connection
For point-to-point (non-multipoint) serial communications with RS-232
data communications equipment (e.g. a personal computer), an RS-232
to RS-485 converter (e.g. the Precision Digital PDA7485) is required.
When using the PDA7485, connect the PD865 according to the
PDA7485 wiring diagram for a two wire RS-485 application.
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Relay Connections
Connections to the two, standard Form A relays, are made to the
connector labeled RLY1 and RLY2. See Figure 5. Connections to the
two optional Form C relays are made to the six-terminal connector
labeled RELAY3 and RELAY4.
Figure 7: Standard and Optional Relay Connectors
Switching Inductive Loads
The use of suppressors (snubbers) is strongly recommended when switching
inductive loads to prevent disrupting the microprocessor’s operation. The
suppressors also prolong the life of the relay contacts. Suppression can be
obtained with resistor-capacitor (RC) networks assembled by the user or
purchased as complete assemblies. Refer to the following circuits for RC network
assembly and installation:
L
O
A
or
D
Figure 8: AC and DC Loads Protection
Choose R and C as follows:
R: 0.5 to 1 for each volt across the contacts.
C: 0.5 to 1 µF for each amp through closed contacts.
Notes:
1. Use capacitors rated for 250 VAC.
2. RC networks may affect load release time of solenoid loads. Check to
confirm proper operation.
3. Install the RC network at the meter's relay screw terminals. An RC network
may also be installed across the load. Experiment for best results.
4. For low voltage DC loads, place a diode across the load with a reverse
breakdown voltage two to three times the circuit voltage and a forward
current at least as large as the load current. Shown in
Figure 9
19
PD865 Snooper Modbus Serial Input Meter Instruction Manual
L
O
A
D
Figure 9: Low Voltage DC Loads Protection
RC Networks Available from Precision Digital
RC networks are available from Precision Digital and should be applied to each
relay contact switching an inductive load. Part number: PDX6901.
Note:
Relays are de-rated to 1/14th HP (50 watts) with an inductive load.
20
PD865 Snooper Modbus Serial Input Meter Instruction Manual
4-20 mA Output Connections
Connections for the 4-20 mA transmitter output are made to the
connector terminals labeled “mA OUT, I-, I+”. The 4-20 mA output may
be powered from an internal power supply (optional) or from an external
power supply.
24V OUT
P+
P-
21
mA OUT RLY2 RLY1
I- I+ NO COM NO COM
12
3 4 5 6
Remote Display,
+
Chart Recorder,
etc.
-
Figure 10: 4-20 mA Output Powered by Meter
mA OUT RLY2 RLY1
I- I+ NO COM NO COM
12
Remote Display,
Chart Recorder,
etc.
External
Power
Supply
+-
+
-
Figure 11: 4-20 mA Output Powered Externally
3 4 5 6
21
PD865 Snooper Modbus Serial Input Meter Instruction Manual
SETUP AND PROGRAMMING
There is no need to recalibrate the 4-20 mA
output (when installed) as received from the
factory.
T he 4-20 mA output is factory calibrated
prior to shipment. The calibration equipment is
certified to NIST standards.
Overview
There are no jumpers involved in the meter setup procedure.
Setup and programming is done through the front panel buttons.
After power and signal connections have been completed and verified,
apply power to the meter.
22
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Front Panel Buttons and Status LED Indicators
Button
Symbol
Description LED Status
Menu
Right arrow/Reset
Up arrow/Max
Enter/Ack
1 Alarm 1
2 Alarm 2
3 Alarm 3
4 Alarm 4
S Set point indicator
R Reset point indicator
Press the Menu button to enter or exit the Programming Mode at
any time.
Press the Right arrow button to move to the next digit during digit
programming.
Press the Up arrow button to scroll through the menus, decimal
point, or to increment the value of a digit.
Press the Enter/Ack button to access a menu, to accept a setting, or
to acknowledge a relay.
Press and hold the Right arrow and the Menu buttons, for three
seconds, to access the Advanced features of the meter (Tip: press
and hold Right arrow first then Menu).
See page 62 to display maximum and minimum readings.
23
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Display Functions and Messages
The meter displays various functions and messages during
setup/programming and operation. The following table shows the
displayed functions and messages with their action/setting description.
Display Parameter Action/Setting
nmodE
nmAStr
FunCod
Fun 03
Fun 04
Pv.nbr
SLAv.Id
Id-Pv1
Id-Pv2
Id-Pv3
Id-Pv4
Id-Pv5
Id-Pv6
Id-Pv7
Id-Pv8
rEG.nbr
Reg.Pv1
Reg.Pv2
Reg.Pv3
Mode
Master
Function
Code
Function
Code 03
Function
Code 04
Number of
PVs
Slave ID
PV1 ID
PV2 ID
PV3 ID
PV4 ID
PV5 ID
PV6 ID
PV7 ID
PV8 ID
Register
Number
PV1
Register
PV2
Register
PV3
Register
Enter the Mode menu.
Select Master Mode.
Enter the Function Code menu for Master or
Snooper mode.
Use Function Code 03 to read slave device.
Use Function Code 04 to read slave device.
Enter the Number of PVs to be read from the
slave device(s).
Enter the Slave ID menu for Master and Snooper
modes. Enter the Slave ID or address for Slave
mode.
Enter the Slave ID or address for PV1.
Enter the Slave ID or address for PV2.
Enter the Slave ID or address for PV3.
Enter the Slave ID or address for PV4.
Enter the Slave ID or address for PV5.
Enter the Slave ID or address for PV6.
Enter the Slave ID or address for PV7.
Enter the Slave ID or address for PV8.
Enter the Register Number menu.
Enter the Register Number for PV1.
Enter the Register Number for PV2.
Enter the Register Number for PV3.
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PD865 Snooper Modbus Serial Input Meter Instruction Manual
Display Parameter Action/Setting
Reg.Pv4
Reg.Pv5
Reg.Pv6
Reg.Pv7
Reg.Pv8
1-reg
2-reg
5 dig
6 dig
Data.1
Short
Long
Float
bcd
binary
unSigd
SignEd
1234
4321
PV4
Register
PV5
Register
PV6
Register
PV7
Register
PV8
Register
1 Register
2 Registers
Reg. Numb.
digits
Data Type
Short
Integer
Long
Integer
Floating
Point
BCD
Binary
Unsigned
Signed
Byte Order
Byte Order
Enter the Register Number for PV4.
Enter the Register Number for PV5.
Enter the Register Number for PV6.
Enter the Register Number for PV7.
Enter the Register Number for PV8.
Select 1 register for the assigned PV (short
integer).
Select 2 registers for the assigned PV (long,
float).
Select either 5 (x0001-x9999) or 6 (x00001x65536) digits for the Register Number by
pressing the Right arrow in Register Number
menu.
Enter the Data type menu for PV1.
Select Short Integer as the data type to be read
from the slave device (PV1).
Select Long Integer as the data type to be read
from the slave device (PV1).
Select Floating Point as the data type to be read
from the slave device (PV1).
Select BCD format for Short or Long integers.
Select Binary format for Short or Long
integers.
Select Unsigned Binary format for Short or Long
integers.
Select Signed Binary format for Short or Long
integers.
Select big-endian byte order.
Select little-endian byte order.
25
PD865 Snooper Modbus Serial Input Meter Instruction Manual
Display Parameter Action/Setting
2143
3412
T-PoLL
t-rESP
Slave
Snoopr
Serial
Baud
300
600
1200
2400
4800
9600
19200
PArity
no
1 Stop
2 Stop
Even
odd
t-byte
Prog
Byte Order
Byte Order
Poll Time
Slave
Response
Timeout
Slave
Snooper
Serial
Baud
300 baud
600 baud
1200 baud
2400 baud
4800 baud
9600 baud
19200 baud
Parity
No parity
1 Stop bit
2 Stop bits
Even parity
Odd parity
Byte-to-byte
timeout
Program
Select byte-swapped big-endian byte order. Not
available for Short integer.
Select byte-swapped little-endian byte order. Not
available for Short integer.
Enter the time between read commands. In other
words, how often the display is updated in
Master mode or how long to wait for data in
Snooper mode.
Enter the time allowed for a slave device to
respond to a command.
This setting is applicable to Master and Slave
modes.
Select Slave mode.
Select Snooper mode.
Enter Serial menu.
Enter the Baud rate menu.
Select 300 baud for all serial communications.
Select 600 baud for all serial communications.
Select 1200 baud for all serial communications.
Select 2400 baud for all serial communications.
Select 4800 baud for all serial communications.
Select 9600 baud for all serial communications.
Select 19200 baud for all serial communications.
Enter the Parity menu.
Select No parity.
Select 1 stop bit with no parity
Select 2 stop bits with no parity
Select Even parity.
Select Odd parity.
Enter the timeout value allowed between
received bytes.
Enter the Programming menu.
26
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