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IM133, Page
Channel Setup Data - This packet consists of 7 items. These items correspond exactly to the 7 items
associated with the Programming Mode Function LEDs on the front panel of the 13x units. If the unit
number indicated in the transmission header equals zero (0) then data will be applied to all units for the
specified channel(s). If the channel number indicated in the transmission header equals zero (0) then
data will be applied to all three channels of the addressed unit. The following must be adhered to for
proper reception by the 13x units:
1) The order of these items is fixed. For Model 133 the order is Input Select to Monitoring, for
Model 136 the order is Voltage Excitation to Monitoring. For the range of possible settings for
each item see the sections below on model specific hardware control.
2) Only complete setups are accepted (all 7 items sent even if only 1 changes).
3) Each item’s setting must be converted to a decimal integer string scaled to accommodate the
transmission of floating point values with resolutions to 1/1000. (ie all item settings are
multiplied by 1000 and converted to ASCII).
4) Each item is separated by 1 space character (0x20)
Channel Calibration Constant Data - This packet consists of 7 items. These items correspond exactly to
the 7 items associated with the Function LEDs on the front panel of the 13x units while in Calibration
Mode. The specifics of these are detailed in the section specifying Calibration Mode. Their method of
transmission is identical to that of the channel setup transmission.
Data Interval - This is an unsigned integer value (16 bits) which represents the number of seconds
between data transmissions, calibrated or raw, after either of the ‘Send Data’ commands is sent to a 13x
unit. A value of 0 indicates a single sample of data is requested. The 13x firmware will terminate the
Send Data condition after 1 sample of data (per enabled channel) is sent. To accomplish single
transmissions easily set the Data Interval to 0 first then send Send Data commands at will. One data
sample per Send Data command will be returned with this scenario. The firmware default is 0 - Single
Shot mode.
Checksum (Required) A one byte summation of the entire transmission, header and data (if any) without
the terminator, is required on all transmissions sent to the 13x.
Terminator (Required) The last item in the transmission, A Line Feed character (0x0A).
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