How to connect an Epson POS Printer with a Micros IDN Adapter
Micros controllers supports up to 15 IDN devices along the same RS422 line.
The IDN card must have a unique printer ID on the line. The card contains
a series of switches that let you set the device ID from the default value of 1.
- Dual RJ-11 Female (adapter end)
IDN cards use RS-422 patch cords
Tech Tip: Regular Serial (RS-232) versus
Though they are both serial protocols there is a difference
between RS-232 and RS-422. RS-422 supports multi-drop, meaning
more than 1 printer can exist on the physical line. RS-232
(9-pin serial) is single drop. RS232 cannot communicate with
RS422 other without a converter. All RS422 cable runs should be
4000 feet or less, and all RS232 cable runs should be 50 feet or
less. In environments with a high level of EMI, shorter runs may
Some of the patch cords used by MICROS IDN devices use a 6-Pin
RJ11 connector. Never plug this connector into an 8-pin RJ45
jack. The smaller body of the 6-pin connector can push pins 1
and 8 into the shielding around the jack, rendering the port
Tech Tip: IDN Loopback Test
The IDN interface is a balanced RS-422 serial connection. A loopback test is a good way to test if the IDN is working.
The test checks to see if the transmit and receive lines of
the printer card are functioning by tying or looping the
transmit line to the receive line on the card.
Making a loopback plug:
Use an RJ25 (6P6C) male connector, or female jack
with a cable. Wire pin 2 to
pin 4, and pin 3 to pin 5;
pin 1 is ground, and is not needed for this test.
Note: pin 1 is the rightmost pin when RJ25 plug is held with
plug end facing you, cable away from you, and locking clip
Simple DIY loopback plug
To use this plug in a test, use the following procedure:
(1) Turn OFF the TM-T88/TM-U220 printer
(2) On the IDN interface in back, turn ON dip switch #7 (IDN
(3) Plug loopback test plug into either IDN port. Make sure printer has paper
(5) Turn ON printer. This will run the IDN self test.
(6) The resulting print-out will give the results of the
IDN self test including the loopback test. Look for the "Loop
Back With Test Plug" results towards the bottom of
Loopback test results without plug (left) and with loopback
plug in place (right)
A hypothetical Micros
installation, showing the drop to IDN devices
With RS-422 multi-drop printers can be
'threaded' along the same RS422 line through a series of incoming and
outgoing patch cords. The last printer on the line does not require a
Cluster Controller provides a means of using CAT 5 distribution with IDN
(RS422 printer connection)
The right side of the patch panel shows an example of how to create a
daisy chain or multi-drop line for IDN Printers. Each IDN printer
(with the exception of the last printer in the line) requires a pair of
patch cords to attach to the pair of Category 5 cable
Installation Steps for
Installing Micros IDN
1. Disconnect power and other cables from the EPSON printer, and
remove the printer DIP switch cover plate.
2. Remove the existing interface board from the printer by unscrewing 2 screws.
3. Properly align and push the new module into the printer. Fasten the two
mounting screws through the faceplate of the new interface.
4. Set printer DIP switches as necessary; then attach the access cover.
5. Set the IDN DIP switches as necessary.
6. Connect the power cable to the printer and apply power.
7. Run a configuration report. This shows that the printer, module, and firmware
are all installed and operating correctly and shows how the communication
parameters are set.
The IDN adapter can replace the existing adapter and
is held in place by 2 screws.
Note: If changing a printer to Micros
IDN you must change the specific dip switch on the
Epson printer to allow for the Micros IDN card.
Getting Initial Printer and
IDN Adapter Settings
Get the initial settings of the Micros IDN adapter. Run the printer self test (hold down
the feed button while turning on the printer). The printer will print a list of
initial settings including interface type and buffer capacity. verify that the
interface is "Micros IDN"
A similar test can them be done on
the IDN adapter:
Faceplate of IDN adapter, DIP switch 7 is the
leftmost switch in this view
Turn OFF printer
Locate the series of 7 small
switches on the faceplate of the IDN card
Set module DIP switch #7 to ON
Turn ON printer (don't press
After power on. the printer
prints the diagnostic printout
Power OFF the printer
Reset DIP switch #7 to OFF
A strip will print showing the
version of the interface card, the character set in use and the switch
configuration of the IDN card. If the test strip does not print, check the
switch settings on both the printer and the IDN card.
Setting Address - DIP Switch Settings on IDN
The 7 position DIP switch can be on
the front panel of the IDN
Switch 1-4 determines the ID printer
(1-15, default ID is 1).
Switch 5-6 set the baud rate of the IDN interface (default is 9600 baud)
Switch 7 is used to run the diagnostic test (default is off)
Configuration of Epson Series Printers to work with the IDN card
The Micros IDN module only supports 9600,
19200 and 38400 baud. The printer and the Micros IDN module must have the same
baud rates to communicate. The printer must be configured like a serial
interface. These settings change the printer to 9600 baud (8
bits, No parity, DTR/DSR handshaking)
with a small receive buffer
Note: The Micros IDN module only supports 9600, 19200 and 38400 baud. The
printer and the Micros IDN module must have the same baud rates to communicate.
For TM-T88IV settings use the TM-88III settings -
Confirm the initial settings of the Printer
Run the printer self test (hold down
the feed button while turning on the printer). The printer will print a list of
initial settings including interface type and buffer capacity. Verify that the
interface is "serial" for the Micros IDN adapter.
Location of DIP Switches on a TM-T88V and Switches to Set on Switch Bank 1 and
Switch Bank 2
Self-Test - Running a Configuration Report
To Run the Config Report
Power on the printer,
Open the paper
press the FEED button,
Close the paper cover.
The configuration report will now
print. It should include information such as the MAC address, the IP address and
the gateway address. After printing, don't forget to return DIP switch 1 to the
For the EPSON TM-U200 printer:
Set DIP switch 1 on the Micros IDN Module
to ON and power up the unit. After report has printed, power off unit and return
DIP switch to the OFF position.
Installing the Device Drivers
Contact Micros for drivers for the
There are no Windows drivers available for IDN card from Epson.
Connectivity Problems, never printed
The IDN address is wrong or is a duplicate. Check switch
settings on the IDN card.
The printer or the interface card is defective. Confirm
printer operation with self-test.
Confirm interface card by swapping with another interface card or printer.
If printer prints random characters and beeps, it may be an
indication that the DIP switches on the bottom of the printer
are set incorrectly. The printer DIP switches are located on the bottom of
the printer behind a small metal hatch that is held in place by a single
Philips screw. for a TM-T88V, switches 1-2 1-7 and 2-7 should be on
and the rest off. See the above picture for reference and colored the
correct switch position in red. Up, away from the numbers, is on and down is
off. Please make sure each switch is fully up or down, as being partially
switched can also cause a problem.
The interface settings are not the same on both the printer
and computer. Run the printer self test
to show the current settings on the printer. Check the computer side to see
that interface is parallel. Settings can be changed on the printer
using the DIP switches on the underside of the
The printer selected in the software is not correct or the
software doesn't support the printer in use.
No longer prints
The TM printer is turned off. Turn on the TM printer.
Confirm the connection of the power supply unit or the voltage of the
The TM printer is offline. Turn the TM printer online.
The ERROR LED of the TM printer is on or flashing.
Remove the error cause.
The printing port of the driver on the computer side
is not specified correctly. Confirm the driver setting on the computer side.
The printer is not online in Windows. Check the status of
the printer in the Windows Control Panel, the printer should show status as
ready. Tip: try stopping and restarting the Print Spooler from
the Services applet of the Control Panel.
Printing is slow