PTW MULTIDOS - Data Telegrams

MULTIDOS
RS232 Interface
Application Dual Channel Dosemeter
10 D177.131.2/0
7.2 Data telegrams
7.2.1 Read measured values
The response to a data telegram consists of various fields, separated by semicolons. The fields contain pa-
rameters and text.
The response to the D telegram is:
Dm;ttttt.ns;sss;FL;O;L;M;±m.mmmE±ee;a;±m.mmmE±ee;a;·####.#;bbbbb
The measured values and resolution indicators are that of the actual measuring mode and are transmitted
channel 1 first, followed by channel 2. The ratio is always transmitted, even if absolute values are displayed
(see below).
7.2.2 Description of parameters
m
Actual measuring mode. Valid values: 0 Þ Dose or Charge, 1 Þ Doserate or Current
ttttt.n
Elapsed measurement time. Consists of seven characters. Small numbers are right justified,
with leading spaces. Parameter n can have the values of 0 or 5.
If the maximum measurement time of 64800 seconds is exceeded, OL••••• will be transmit-
ted.
sss
Measurement status. Valid values: RES, STA, HLD, INT, RUN, NUL, ERR.
FL
Global flags. A two digit number, whose set bits, when converted to binary representation,
signal the following error:
.0 Þ any of both channels is overloaded at the moment
.1 Þ math error in any channel
.2 Þ MULTIDOS data acquisition error
.3 Þ MULTIDOS HVerror at the moment
.4 Þ overload in any of both channels since the start of a dose measurement
.5 Þ MULTIDOS HV error since the start of a dose measurement
.0 is the least significant bit
O
Overload flags of the doserate / current measurement. One digit, whose set bits, when con-
verted to binary representation, signal the following errors:
.0 Þ overload in channel 1
.1 Þ overload in channel 2
L
Latched overload flags of the dose / charge measurement. One digit, whose set bits, when
converted to binary representation, signal the following errors:
.0 Þ overload in channel 1 since the start of a dose measurement
.1 Þ overload in channel 2 since the start of a dose measurement
M
Math error flags of the actual measurement mode. One digit, whose set bits, when converted
to binary representation, signal the following errors:
.0 Þ math error in channel 1
.1 Þ math error in channel 2
±m.mmm
Mantissa of the measured value. This field consists of six characters. Smaller numbers are
right justified, with leading spaces. Positive numbers use a space character instead of the
minus sign.
If the limits of representation (±999.9E+20) are exceeded, +0L••• or -0L••• will be transmit-
ted, depending on the sign.
E±ee
Exponent of the measured value. Two digit number, with leading zeroes if necessary. The sign
is always transmitted, either as + or -.
If the limits of representation are exceeded, •••• will be transmitted.
a
Resolution of the measured value. One digit. Valid values:
2 Þ resolution below 1% (conforming to ** on the measuring screen)
1 Þ resolution below 0.5% (conforming to *)
0 Þ resolution is 0.5% or better