User Manual

cellnetmiu Rev. 0

12/3/98 4:32 PM

Abnormal Operation

Below are examples of abnormal operation for four-wheel encoders. Abnormal operation for

six-wheel encoders is similar except that digit occupy all six positions.

A If an (H) or a ( - ) occurs on any of the four positions, the Wall MIU1 will transmit the

data as follows:

Examples: 1 2 E 4 0 0 or 1 2 b 4 0 0

If the wire between the Wall MIU1 and the encoder is cut or reads as open, the Wall MIU1

will transmit the following data:

Example: AAAAAA

For three-wire installation, the problem may be in the register, wiring between register and

receptacle, receptacle pins, or the TU-89 pins. If all pins are clean and the wiring is verified

to be good, replace the register.

Example: H H H H - -For three-wire installation, replace the register.

SECTION 5

TESTING AND MAINTENANCE

After the MIU has been installed and wired, follow these steps to verify that the MIU is

working properly:

1 Activate the MIU by holding the magnet for two seconds against the arrow on the Main

Housing. The arrow is just to the right of the Terminal Screws.

2 Use a CellNet installation tool to verify the transmission from the Wall MIU1.

¥ Verify all electrical connections.

¥ Test the installation again.

5 If a Pro-Read

¨ Encoder Register is used:

¥ Insure the unit is programmed in Ò3-wire mode.Ó

¥ Verify all electrical connections.

¥ Reactivate the MIU. (See Step 1)

6 If a problem still exists, refer to Section 5, ÒTesting And Maintenance.Ó