Red Lion PAXCDC5 User Manual
MICRO
DP
DATA
WD
PROFIBUS-DP
CONNECTOR
CONTROLLER
DIAGNOSTIC
LEDs
R0TARY
SWITCHES
(ON BACK)
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R0TARY
SWITCHES
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MODEL PAXCDC - PROFIBUS-DP COMMUNICATIONS OPTION CARD
CONNECTS PAX METER TO PROFIBUS-DP NETWORK
STANDARD 9-PIN D-SUB CONNECTOR INTERFACE
CYCLIC I/O DATA TRANSMISSION, UP TO 84 BYTES IN/OUT
OPERATING RANGE FROM 9.6 KBAUD TO 12 MBAUD WITH
AUTOMATIC BAUD RATE DETECTION
STATION ADDRESS SET THROUGH ROTARY SWITCHES
CONFIGURATION VIA SELECTION OF PRE-CONFIGURED
MODULES FOR THE SPECIFIC PAX METER TYPE
FREEZE MODE AND SYNC MODE SUPPORTED
DIAGNOSTIC LEDs INDICATE CARD STATUS
PNO CERTIFIED, CONFORMANCE TESTED SLAVE DEVICE
Bulletin No. PAXCDC5-D
Drawing No. LP0549
Released 01/11
DESCRIPTION
connection for a PAX panel meter to a PROFIBUS-DP Network. This allows a
PROFIBUS Master device, such as a PLC, to control and monitor the operation
of the PAX meter. The meter functions as an intelligent PROFIBUS-DP Slave
device on the Network.
female connector on the rear of the card. The card is installed in the PAX meter
using a slotted rear cover, allowing the PROFIBUS-DP Connector to extend
beyond the rear of the PAX case. Power for the card is provided internally from
the power supply of the PAX meter. The PROFIBUS-DP Network is isolated
from the control electronics on the card using high-speed optocouplers.
Detection, with an operating range of 9.6 Kbaud up to 12 Mbaud. The Station
Address is set via rotary switches. The card’s address is read at power up.
The PAX PROFIBUS-DP Communications Option Card provides a direct
The PROFIBUS-DP Network connects through a 9-pin D-subminiature
This fully featured communications card supports Automatic Baud Rate
Data Exchange with the Master device occurs through cyclic I/O data
transmission. The size of the I/O data block is determined by the selection of
pre-configured Modules for the specific PAX meter type. All data values are in
32-bit integer format, Motorola byte ordering. The PROFIBUS-DP protocol per
EN 50170 is implemented using the Siemens SPC3 ASIC. Three on-board
Diagnostic LEDs indicate the status of Data Exchange (DATA), the SPC3
Watchdog (WD) and DP State Machine (DP).
PNO Conformance and GSD File
The PAX PROFIBUS-DP Card is PNO certified, having passed the
conformance test for PROFIBUS-DP Slave devices, Certificate No. Z01170.
The PNO Identifier for this PROFIBUS device is 0x09D0. The functional
characteristics are described in GSD file REDL09D0.GSD. The GSD file and
PAX bitmap can be downloaded from the Red Lion Controls website.
SPECIFICATIONS
1. FIELDBUS TYPE: PROFIBUS-DP per standard EN 50170, implemented
with Siemens SPC3 ASIC
2. BUS INTERFACE: Isolated RS485 through 9-Pin D-Sub connector
3. NETWORK ISOLA TION: 500 Vrms for 1 minute (50 V working) between
PROFIBUS-DP network and PAX Sensor & User Input commons. Not
isolated from other PAX option card commons.
4. POWER: Card powered internally by the PAX meter
5. OUTPUT POWER: +5 VDC @ 90 mA max. available on the D-Sub
connector pins 5 (GND) and 6 (+5 V)
6. BAUD RATES: 9.6 Kbaud to 12 Mbaud, Auto Baud Rate Detection
7. STATION ADDRESS: 0 to 125, set by rotary switches
8. SUPPORTED FUNCTIONS:
FREEZE Mode: Supported
SYNC Mode: Supported
FAIL SAFE Mode: Not Supported
EXTERNAL DIAGNOSTIC DATA: Not Supported
9. INSTALLATION REQUIREMENTS:
Installed Depth: 4.88" (124 mm) from the rear of the PAX bezel
Additional Height: 0.35" (9 mm) above the PAX case surface
ORDERING INFORMATION
MODEL NO. DESCRIPTION PART NUMBER
PAX PROFIBUS-DP Communications Card
1
PAXCDC50PAXCDC
INSTALLING AN OPTION CARD
Finger
Hold
Finger
Hold
Serial
Communications
Card
Setpoint
Output
Card
Alignment
Slots
Connectors
Main
Circuit
Board
Analog Output
or
Real-Time
Clock Card
Caution: The option and main circuit cards contain static
sensitive components. Before handling the cards, dischar ge static
charges from your body by touching a grounded bare metal
object. Ideally, handle the cards at a static controlled clean
workstation. Also, only handle the cards by the edges. Dirt, oil or
other contaminants that may contact the cards can adversely
affect circuit operation.
Warning: Exposed line voltage exists on the circuit boards.
Remove all power to the meter AND load circuits before
accessing the unit.
1. Remove the main assembly from the rear of the case. Squeeze the finger
holds on the rear cover, or use a small screwdriver to depress the side
latches to release it from the case. It is not necessary to separate the rear
cover from the main circuit card.
2. Locate the option card connector for the serial communication card.
Hold the unit by the rear cover, not the display board, when installing an
option card.
3. Install the option card by aligning the option card with the slot in the rear
cover. Be sure the connector is fully engaged and the tab on the option
card rests in the alignment slot on the display board.
4. Slide the assembly back into the case. Be sure the rear cover latches fully
into the case.
TOP VIEW
PRINCIPLE OF OPERATION
The PAX PROFIBUS-DP Card provides the PROFIBUS Network with
access to an Input Data Block (data written to the PROFIBUS Network from the
PAX) and an Output Data Block (data read from the PROFIBUS Network by
the PAX). Using an internal high speed protocol, the card scans each PAX
register in turn, continuously reading Input Data and only writing Output Data
on demand. The PAX registers are mapped into each Input and Output Data
Block, allowing the PROFIBUS Network read/write access to all the registers
in the PAX. The structure of these Data Blocks is described in more detail in
section Data Block Structure.
The Input Data and Output Data Blocks are updated at the end of each scan
of the host PAX Meter. In order to increase the rate that new data is made
available to the PROFIBUS Network, a scheme is employed that reduces the
number of registers polled by the card in each scan to only those that are
required in the application. This Polled Read Mask maps each bit to a PAX
register index which, when set, will force that register to be read from the PAX
Meter. This Polled Read Mask is defined as User Parameter Data and is
described in more detail in section Parameterization.
Due to the cyclic nature of data exchange in the PROFIBUS network
changing Output Data in a slave device, a scheme is employed that indicates
which registers need to be written to the PAX Meter. This Demand Write Mask
maps each bit to a register index which when set, will perform a “once only”
write from the Output Data Block to the PAX Meter. Clearing and re-setting the
bit in the Demand Write Mask will cause the value to be written again. The
Demand Write Mask is part of the Data Block structure and is described in detail
in section Demand Write and Store Request Masks.
STATION ADDRESS
The station address is set using three rotary switches allowing the ID to be set
in standard decimal notation (e.g. address = 123 - SWC = 1, SWB = 2, SWA =
3). Valid addresses range from 0 to 125. If an address greater than 125 is set, the
card will default to a station address of 125.
DIAGNOSTIC LEDs
Three LEDs indicate the status of the SPC3 DP Control State Machine (DP),
the Watchdog State Machine (WD) and the PROFIBUS-DP Data Exchange
State (DAT A) as shown in Table 1. The LEDs are viewable through the vents on
the top of the PAX case.
Table 1 - LED Indication of PROFIBUS-DP Card Status
LED STATE
DP (Red) WD (Green) DATA (Red)
FLASHING FLASHING OFF Bus Not Connected
OFF FLASHING OFF Baud Rate Search
OFF ON OFF Baud Control
FLASHING ON OFF Waiting for Parameterization
ON ON OFF Waiting for Configuration
OFF OFF ON Data Exchange
CARD STATUS
Note: The card will not default to 125 if set for 999, this number is a special
test mode.
2
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