KEYENCE DL-PD1 - Manual (Page 55)

3-6 DP-V1 Service
3-33 - PROFIBUS DP Compatible Network Unit DL-PD1 User's Manual (GT-70A) -
Execu
ting Communi
cat
ion
3
Calculations other than for standard difference display are effective only on the main unit
(ID: 01). These parameters read the R.V. value (synchronized with the calculation
results) of the main/expansion unit(s) for the main unit to calculate the results.
For example, set the data number (HEX) to "01A3" when you read the value of the
expansion unit on which calculation result of the main unit is based.
Calculations for standard difference display are effective only on the expansion units (ID:
02 to ID: 10). These parameters read the R.V. value (synchronized with the calculation
results) of the main/expansion unit(s) for the expansion unit to calculate the results.
For example, set the data number (HEX) to "03A1" and send the command when
you read the value of the main unit (ID: 01) on which calculation result of the
expansion unit (ID: 03) is based.
This read command is useful when you use the calculation function with the
detection mode set to hold detection (peak hold) and when you read the R.V.
value of the main/expansion unit(s) for calculation as well as the calculation
results.
The read command for the P.V. value can read the held values, while that
for the R.V. value reads the raw value when the command is received.
Therefore, the read R.V. value is not synchronized with the latest values.
This read command can read the R.V. value of each sensor amplifier for
calculating the held values.
The read R.V. values are synchronized with the held values and
eliminates the influence of communication response delay.
*11 The read character string is stored in ASCII code into the remote register.
For "GT7-": RWr03 = 372Dh, RWr02 = 5447h
Reference