Before installing your White Knight product, please carefully review the product manual. There are many helpful hints and ways to optimize the set up and use of your White Knight product as well as instructions and requirements for installation. In addition, there are many accessories in this manual that will enhance the functionality of your White Knight product.
Dispense measured at full stroke with maximum and minimum supply pressures at 80 psi and 60 psi. 3. White Knight only warrants the PEM050 to 500,000 cycles, test ran at full stroke 4. “Max” represents 80 PSI supply pressure; “Min” represents 60 PSI supply pressure 5.
White Knight pump will nullify this warranty. The PEM050 metering pump is warranted for up to 80 PSI air supply pressures, and 80 PSI discharge pressures. Wearable parts are not covered if used to pump abrasive slurries.
DO NOT LIFT PUMP BY LIQUID FITTINGS OR AIR TUBING! Air Supply The operation of the PEM050 requires a minimum of 60PSI air supply pressure, ran through a minimum ⅛” ID airline. Supplying less than 60 PSI air supply pressure to the pump will not allow the positively controlled inlet/outlet valves to fully actuate.
4.2 System and Pump Environment Recommendations/Requirements Clean Supply Air (CDA) White Knight high purity pumps require the use of Class 2 air for particles and moisture per ISO 8573-1. (Use 10 micron filter, maintain -40° C dew point) Abrasive Slurries Pumping of abrasive slurries will shorten the life of any pump.
4.5 Connections All connections to the PEM050 can be accessed from the front of the pump. The diagram below shows all of the connections for reference throughout the manual. Liquid I/O Ports: Each port can be ether a refill port or dispense port, see communication protocol for more details.
5.1 Motor on Bottom Orientation: The above image shows: Left) PEM050 6 port head, Middle) a 3D rendering of the minimum internal pump volume, Right) a section view of the minimal internal pump volume (shown in blue). The minimal hold-up volume consists of the volume that is undrainable out of the lowest port of the pump, shown in blue below the dotted line.
Lowest Port The above image shows: Left) PEM050 6 port head, Right) a 3D rendering of the minimum internal pump volume, Middle) a section view of the minimal internal pump volume. In the table volume below the dotted line for each port level is noted assuming all fluid above the bottom of the fluid line will drain out.
Connecting to Multiple Devices Using Party Mode and RS422/RS485 In some cases an application might require using one serial port to communicate to multiple devices. A PEM050 can be put into party mode, which allows the serial communication line to be split to talk to multiple devices over a single seral port.
+/- on the computer/PLC is connected to the receive +/- on the PEM050 and the receive +/- on the computer/PLC connects to the transmit +/- on the PEM050. (make sure to match + to + and – to -) 6.1.4 Ethernet over TCIP The PEM050 is a device that communicates using a serial communication protocol.
Page 17
The search window will close and when the search is completed a list of available devices will be listed on the main window on the left. Each PEM050 will have a unique MAC address, The MAC address has been attached to the PEM050 with a tag.
8 Standard Communication Protocol The PEM050 is a stepper motor driven metering pump that is able to dispense volumes from 1 milliliter up to 50 milliliters. The PEM050 uses a standard RS-422 full duplex serial communication, which can be configured as a RS-485 half duplex serial communication port or can be ordered with an Ethernet converter to adapt into Ethernet networks.
8.1.1 Communication Modes: By default, the PEM050 will echo back each character as each character is received. This is helpful when using a terminal to interact with a single PEM050. However, when connecting to a PLC or if connecting multiple devices in series then it may be desired to enable one or all of the following communication modes: Echo Mode: Echo mode controls how the PEM050 responds when communications are received.
Page 20
& line feed. Note: If a command is to be sent to all devices the asterisk “*” is a special device address that all PEM050 will respond to independent of their unique device name. When the asterisk is use none of the PEM050s in the network will echo the command to prevent communication issues.
After the software reset the PEM050 will perform a calibration before it is ready for use. 8.1.4 Configure Digital Signals: The PEM050 has two digital I/O ports available for 2 – 5 port versions, and one digital I/O port available for the 6 port version. The available digital ports can be configured to operate as: •...
The PEM050 is configured to execute predefined actions; the actions will act according to the parameters currently set on the PEM050. Each action can be called using the action initiation command. Below is a brief overview of each action, for more details about each action, go to the action section: 8.3.1 Pumping Actions:...
Set the refill amount and the dispense amount to the same value if dispense amount is less than or equal to maximum capacity of the PEM050. If greater than full capacity then set the dispense to full capacity, and let the PEM050 dispense full shots.
However, it has come to our attention that most customers don’t require full power and when set in a constant run application the motor can get damaged due to excessive heat generation. White Knight is recommending that all customers analyze their implementation of the metering pump and to reduce the motor current to an appropriate value for their application.
As part of the PEM050 program there are process indicator flags, errors, and troubleshooting indicators that can be called at any time to understand the PEM050’s status. Most flags and errors are only a Boolean data type (1 or 0). Using the Boolean flags and errors the WA variable has been created as a 30-bit binary status code. Each bit of the status code represents the status of a unique error, flag, or action initiation variable.
All parameters associated with the refill, vent, or pressure compensation will stay from refill action to refill action, and only need to be changed to modify the refill action’s behavior: (Note: text after apostrophes, are comments and do not need to be sent to the PEM050.) RA=41000 ‘Refill Amount: 50 mL...
8.10 Error Value Reference This table contains all possible errors that the PEM050 could experience Description of error codes. ER Description of error codes. ER No Error Linear Over Temperature Error (For units without Internal Over Temp) I/O configuration already set Stall detected.
This command keeps setting information needed for operating the valves. 9.3 Creating a Custom Program White Knight will support custom program creation to modify the existing protocol or in creating a new protocol specific for customer requirements. Additionally if a customer would like to program their own firmware then additional resources can be requested.
1. Return the pump to White Knight for a full evaluation, failure analysis, and quote issued by White Knight or our local distributor. Upon the acceptance of the quote in the form of a purchase order the pump will be rebuilt as outlined in the quote.