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APPLICATION #2
A customer would like to monitor several
process variables at one location. At various
stages of the process, the MDI will display the
process data for the operator. If a critical
condition develops, the MDI will display that
condition, as well as the suspected cause.
A TCU is used to monitor and control the
heating of the process. An IMH is used to
monitor the status of the heating element and an
IMI to monitor the speed of the process.
Messages will display the information that is
pertinent during the start-up of the process.
Messages are programmed to take into account
all the various conditions the process may incur.
The parallel port is configured for AMR Mode
1 for Message requests over the parallel port.
The TCU, IMH, and IMI are set-up to
activate their alarm outputs in the event of an
error condition. Each output is tied to a separate
data pin on the parallel port of the MDI. The
MDI will automatically request a specific
Message from the parallel port when a level
change occurs.
EXAMPLE: The TCU's alarm output 1 is tied
to data line 1. In the event of a high temperature condition, alarm output
1 closes. The MDI monitors Data line 1 for a logic level change. Data line
1 has two message numbers attached to it, Message #1 for the Active logic
level and Message #11 for the Inactive logic level. The MDI requests
Message #1 when the Data line undergoes an Inactive-to-Active transition
and informs the operator of a high temperature condition and the time it
occurred. Message #11 is requested when the Data line undergoes an
Active-to-Inactive transition and indicates that the temperature condition
was corrected and the time of correction.
ORDERING INFORMATION MDI
MODEL NO.
DESCRIPTION
MDI
1X10 Red, Negative Image
1X10 Yel-Grn, Negative Image
MDI
1X10 Yel-Grn, Positive Image
2X20 Red, Negative Image
2X20 Yel-Grn, Negative Image
*
2X20 Tri-Color, Negative Image
*
Check availability with factory.
For more information on Pricing, Enclosures & Panel Mount Kits refer to the RLC Catalog or
contact your local RLC distributor.
ORDERING INFORMATION FOR MESSAGE DISPLAY ACCESSORIES
MODEL NO.
SFMD
Apollo Message Display User Software (3 1/2"; 1.44 M)
APS01
+12 VDC Unregulated Power Supply, 115 VAC
APS02
+12 VDC Unregulated Power Supply, 230 VAC
AC Communications Adapter
MCCA
DC Communications Adapter
GCM232
Serial Converter Module RS-232
Note: Only one copy of software is required for multiple units.
When the operator presses a switch to start the process, the start-up
Messages are requested. This switch is connected to one of the MDI's
parallel port data lines. Messages can also be requested and monitored via
the serial port, which is connected to the office computer.
All Messages and Configuration Settings are programmed on an IBM
compatible computer using the Message Display Software SFMD. The
Message and Configuration files are then downloaded to the MDI via the
serial port. The serial link between the computer and the MDI is
conveniently established using the MCCA programming cable. After the
files are downloaded, the MDI is ready to interface with the system.
PART NUMBERS FOR AVAILABLE
SUPPLY VOLTAGES
12/24 VDC
MDI1R11D
MDI1Y11D
MDI3Y11D
MDI2R11D
MDI2Y11D
MDI2T11D
DESCRIPTION
115/230 VAC
MDI1R11A
MDI1Y11A
MDI3Y11A
MDI2R11A
MDI2Y11A
MDI2T11A
PART NUMBERS
SFMD0
APS01000
APS02000
MCCA0000
MCCA1000
GCM23201
®
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