Programming Guide
46 Rev. E2 04/2011 Marathon MR
Relay Control
Laser status
Setpoints
Deadband
Current Output Mode (0 - 20 mA or 4 - 20 mA)
The following items cannot be polled:
Poll/Burst Mode
Baud rate
Relay control
Set current output
An example string for command $=UTQEGH<CR>
The default string is as follows: C T1250 Q0400.023 E1.00 G005.5 H1400 <CR><LF>
9.4 Response Time in Setup Mode
The analog output response time is not guaranteed while a parameter value is being changed or if
there is a continuous stream of commands from the host.
The digital response time specifies how quickly the unit can report a temperature change via RS485 in
burst mode. (Digital response time is not defined for polled mode.) The digital response time is
defined as the time that elapses between a change in target temperature and the transmission of a
burst string reporting the new temperature. Actual digital response time can vary from one reading to
the next, so the digital response time is defined as the “average digital response time.”
The average digital response time depends on the number of characters requested in the output string
and with the baud rate. It may be computed as the following:
where:
t = average response time in ms
n = the number of characters in the string including <CR> and <LF>
b = the baud rate
Example:
With a baud rate of 38400, and an output string containing temperature units, 2-color temperature and
ambient (20 characters), the average digital response time would be the following:
Note that the analog output response time is not affected by baud rate or the number of characters
transmitted in the burst string.
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