Instruction Manual

11
Parameters of Commands and Responses
*2 R: Indicates that the data type can only be read from the sensor amplifiers.
*3 When the instantaneous flow rate exceeds the indicated data range, "99.99", "999.9", or "9999.9"
is returned as the data. Similarly, when the sensor amplifier displays ErH, ErS, or rEv, "EE.EE",
"EEE.E", or "EEEE.E" is returned as the data.
Regardless of the display mode specified on the sensor amplifiers, the data for the "rESo" mode
is returned.
*4 Regardless of the integration display unit specified on the sensor amplifiers, the data is read
with the minimum display unit.
When the integrated flow quantity exceeds the indicated maximum value, the maximum value is
returned as the data.
*5 The data number “008” can be read 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 contents.
For information on each error, refer to "FD-MH Series User's Manual".
•
When the data read from a sensor amplifier is "0068":
"68" converted to binary number is "0000 0100 0100".
Therefore, this data indicates that a "reverse current 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 "0000" is returned.
*6 When the sensor amplifiers display ErH, "E" is returned as the data.
*7 When a temperature sensor is not connected, "EEE.E" is returned as the data.
When the temperature exceeds the indicated maximum value, "999.9" is returned as the data.
Bit Error contents of sensor amplifiers
0 Head error (ErS)
1 Head connection error (ErH)
2 Overcurrent error (ErC)
3 EEPROM error (ErE)
4
Not used
5
6 Reverse current error (rEv)
7 Not used
8 Minimum temperature error
9 Maximum temperature error
10 Temperature sensor connection error (Err tEMP)
11 to 15 Not used
Reference
Bit 6: Reverse current error Bit 2: Overcurrent erro
r
Parameters of Commands and Responses
● Read/write data
The following table lists the types of data that can be read from and written to FD-MH Series sensor
amplifiers.
Data
No.
Data name
Sensor
head
Data
format
*1
No. of
bytes
Attribute
*2
Data range
Initial value
020
Integration reset
request
-
*
1
R
0 - 1: Last written value
0
W
0: Do not perform reset
1: Perform reset
*3
021
Reset during hold
request
(instantaneous flow)
*
1
R
0 - 1: Last written value
0
W
0: Do not perform reset
1: Perform reset
*3
022
Reset during hold
request
(temperature
display)
*
1
R
0 - 1: Last written value
0
W
0: Do not perform reset
1: Perform reset
*3
030
Instantaneous flow
rate setting 1
FD-MH10 **.** 5
R/W
00.00 to 20.00
*4
03.00
FD-MH50 ***.* 5
000.0 to 100.0
*4
015.0
FD-MH100 ***.* 5
000.0 to 200.0
*4
030.0
FD-MH500 ***.* 5
000.0 to 999.9
*4
100.0
031
Instantaneous flow
rate setting 2
FD-MH10 **.** 5
R/W
00.00 to 20.00
*4
10.00
FD-MH50 ***.* 5
000.0 to 100.0
*4
050.0
FD-MH100 ***.* 5
000.0 to 200.0
*4
100.0
FD-MH500 ***.* 5
000.0 to 999.9
*4
200.0
032
Instantaneous flow
rate setting 3
FD-MH10 **.** 5
R/W
00.00 to 20.00
*4
13.00
FD-MH50 ***.* 5
000.0 to 100.0
*4
065.0
FD-MH100 ***.* 5
000.0 to 200.0
*4
130.0
FD-MH500 ***.* 5
000.0 to 999.9
*4
200.0
033
Instantaneous flow
rate setting 4
FD-MH10 **.** 5
R/W
00.00 to 20.00
*4
20.00
FD-MH50 ***.* 5
000.0 to 100.0
*4
100.0
FD-MH100 ***.* 5
000.0 to 200.0
*4
200.0
FD-MH500 ***.* 5
000.0 to 999.9
*4
500.0
034
Integrated flow
quantity setting 1
-
**** 4 R/W
0000 to 9999 0150
035
Integrated flow
quantity setting 2
**** 4 R/W
0000 to 9999 9999
036
Temperature setting
lower limit
***.* 5 R/W
000.0 to 099.9
*5
005.0
037
Temperature setting
upper limit
***.* 5 R/W
000.1 to 100.0
*6
080.0
040 Detection mode
*1R/W
0: F-1
1: F-2
2: F-3
3: A-1
4: A-2
0
041
Integration
direction
*1R/W
0: Increment
1: Decrement
0
042
Time-out time for
output 2 (unit: s)
** 2 R/W
01 to 99 10
043 Output mode
*1R/W
0
Data Output 1 Output 2 Output 3
0 N.O. N.O. N.O.
1 N.C. N.O. N.O.
2 N.O. N.C. N.O.
3 N.C. N.C. N.O.
4 N.O. N.O. N.C.
5 N.C. N.O. N.C.
6 N.O. N.C. N.C.
7 N.C. N.C. N.C.