Specifications

• RS-485 Module is not responding to commands
1. Perform steps 1, 2, 4, 5 and 6 listed above.
2. Ensure that module RS-485 "Data" line (module terminal pin #7) is
connected to the Host RS-485 "Data+" line.
3. Ensure that module RS-485 "Data*" line (module terminal pin #8) is
connected to the Host RS-485 "Data-" line.
4. If the problem is not corrected after completing the steps above then
connect the module by itself to a Host computer as outlined in Chapter 1.0
under "Quick Hook-up". Start the supplied Utility software and please call the
factory for further assistance.
• Events counter not counting properly.
1. Check that the frequency of the signal, being counted is less than 60Hz.
2. Ensure that the signal levels are swinging below +1.0Vdc and greater
than +3.5Vdc.
• Error in displayed value
Make sure that the °C/°F bit is set to a 0. Otherwise the values will be
scaled by the °F equation.
• Read Data (RD) values are factor of two times normal values
Ensure that the Degree C/Degree F bit in the setup (SU) message is set
to Degree C.
• Module responds with ?1 COMMAND ERROR to every command
Ensure that characters in the command message are uppercase char-
acters. All commands consist of uppercase characters only.
• Characters in each response message appear as graphics characters
1. Set the communications software parity setting to "M" for 'MARK' parity
type and 7 data bits. Or, utilize any parity type in both the module and
software other than "NO" parity.
2. In custom written software routines, mask off the most significant bit of
each received character to logic "0". Thus forcing the received character to
7-bit ASCII value.