KEYENCE DL-RS1A/GT-70A - Manual (Page 13)

11
Parameters of Commands and Responses
■ Data numbers
Specify the data number using three digits (ASCII characters).
● Read-only data
The following table lists the types of data that can only be read from GT-70A Series sensor amplifiers.
Writing read-only data results in a communication error (error number: 22).
*1 In the Data format column, "±" indicates that the value can be either "+" or "-" and "*" signifies a
number from "0 to 9".
*2 R: Indicates that the data type can only be read from the sensor amplifiers.
*3 This data type can only be read when the Detection mode of the sensor amplifiers is "Peak-to-
peak" hold.
This data type allows you to read the peak and bottom values during the measurement
period.
Data
number
Data name Data format *1 Number
of bytes
Attribute *2 Data range
000 Comparator value (P.V. value)
±***.*** 8 R -099.999 to +999.999 *5
001 Calculation display value
002 Raw value (R.V. value)
003 Peak value during sampling period *3
004 Bottom value during sampling period *3
005 Control output * 1 R
0: All control outputs are off
1: Only HIGH output is on
2: Only LOW output is on
3: Both HIGH and LOW outputs are on
4: Only GO output is on
006 Sensor amplifier error state ***** 5 R 0 to 65535 *6
010 *4 R.V. value of main unit (ID: 00) on which
calculation result was based
±***.*** 8 R -099.999 to +999.999
011 *4 R.V. value of expansion unit (ID: 01) on which
calculation result was based
012 *4 R.V. value of expansion unit (ID: 02) on which
calculation result was based
013 *4 R.V. value of expansion unit (ID: 03) on which
calculation result was based
014 *4 R.V. value of expansion unit (ID: 04) on which
calculation result was based
015 *4
R.V. value of expansion unit (ID: 05) on which
calculation result was based
016 *4 R.V. value of expansion unit (ID: 06) on which
calculation result was based
017 *4 R.V. value of expansion unit (ID: 07) on which
calculation result was based
018 *4 R.V. value of expansion unit (ID: 08) on which
calculation result was based
019 *4 R.V. value of expansion unit (ID: 09) on which
calculation result was based
Point
Reference
Parameters of Commands and Responses
*4 This data type can only be read when the calculation function is used.
The data can only be read from the main unit (ID: 00) when performing a calculation other than
reference difference. DL-RS1A reads the R.V. values of the expansion units (ID: 01 - 09), which
are used in the calculation, from the main unit. (Only the main unit holds the R.V. values.)
When performing reference difference, the data can only be read from the expansion units. (Only
the expansion units hold the R.V. values.) DL-RS1A reads the R.V. value of the main unit and the
expansion units, which are used in the calculation, from the expansion units.
When using the calculation function, the sensor amplifiers can only hold the P.V. values
of the calculation results.
By using these read commands, the R.V. values of the sensor amplifiers on which the
held calculation result was based can be read. Therefore, it is possible to read the R.V.
value of each sensor amplifier without being affected by the response delay.
*5 When the data read from the sensor amplifiers is one of the following values, it is not a
comparator value but has a specific meaning.
*6 You can read data number "006" to check the error status of the sensor amplifiers.
Convert the five digit number (ASCII characters) read from the sensor amplifiers to a binary
number and check the ON/OFF state of each bit to
check the error.
For information on each error, refer to "GT-70A Series User's Manual".
• When the data read from a sensor amplifier is "00033":
"33" converted to binary number is "0000 0000 0010 0001".
Therefore, this data indicates that a "number of units error" and an "overcurrent error"
have occurred at the sensor amplifier from which it was read.
• If no error has occurred at the sensor amplifier, the data "00000" is returned.
Data read from
sensor amplifier
Description
+EEE.EEE The sensor amplifier is in an error state.
+999.999 The value exceeds the upper limit of the detection range.
-999.999 The value is below the lower limit of the detection range.
-999.998
When using the hold mode, the display of the P.V. value
of the sensor amplifier shows "------".
Bit Sensor amplifier errors
0 Overcurrent error (ErC)
1 Head error (ErH)
2 EEPROM error (ErE)
3 Core alarm error (Er.chK)
4 Self-timing delay error (Er.dLY)
5 Number of units error (Er.Unit)
6 Calculation error (Er.CAL)
7 to 15 Not used
Reference
Reference
Bit 5: Number of units error Bit 0: Overcurrent error