Page 88 Milltronics SF 500 - INSTRUCTION MANUAL 7ML19985CN01
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Communications
Text Messages
If a Siemens Milltronics device parameter returns a text message, that message is
converted to a number and provided in the register. The numbers are shown in the table
below:
Modems
The SF 500 has been successfully connected to several different modems. In general, the
Modbus protocol is a very modem friendly protocol. This section gives some general
guidelines on modems and their connection. For detailed information, see the modem
documentation.
Picking Modems
There are several different types of modems; dial-up, leased line, radio-link, fiber-optic to
name the most common.
Dial-up
uses a standard analog phone line and dials the number of the receiving modem.
Lease line
come in either 2 or 4 wire types and use special phone lines that are ‘leased’ from your
phone company (or you) and do not require any dialing.
Number Text Message as Displayed on LCD
22222 invalid value
30000 OFF
30001 ON
30002 = = = =
30003 (parameter does not exist)
30004 err
30005 err1
30006 open
30007 shrt
30008 pass
30009 fail
30010 hold
30012 hi
30013 de
30014 en
-32768 value is less than -20,000
32767 value is greater than 20,000
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