GE marquette MAC 1100, Servicing Instructions

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Marquette Hellige GmbH MAC 1100/1200 V 1.1 Page
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227 492 20 D - 0002
(1) Sending and receiving
This test enables complete testing of the RS232 signal path for transmitting and
receiving, including RS232 driver and connector.
This test requires an RS232 connector with an internal bridge from pin 2 (RXDE) to pin
3 (TXDE). Depending on the result of the test, the following message appears:
If test result is OK: Out :Hello world!
In :Hello world!
If an error occurs: Out :Hello world!
In : ERROR (In)
(2) Send test string to device
In this test a remote station, e.g., PC must be connected up and have a terminal
program which can receive signals and be configured for the above-mentioned
protocol. If the remote station is on receive, then every time the “2" key is pressed the
test string “Hello world!” is transmitted to the remote station. Simultaneously, the
following message appears on the display:
v24-Settings: “19200, 8, n, 1“
Out: Hello world!
(3) Send and receive with device
Sending and receiving can be tested with a remote device by pressing the “3" key.
The device should be connected as described in (2).
After pressing the “3" key a test string is sent to the remote station. The following
message appears on the display:
Transmitting: Hello world!
Receiving: [ ]
A subsequent input at the remote station is sent back to the device and displayed
there. Moreover, it should be noted that an input must take place within 10 s and the
input terminated with “return”.