User Manual
Table Of Contents

12
Parameters of Commands and Responses
*1 In the Data format column, "*" signifies a number from "0 to 9".
*2 Indicates that the data can only be read from (R), can only be written to (W), or can be both read 
from and written to (R/W) the sensor amplifiers.
*3 Since each reset request is a level action, resets are continuously performed as long as the 
value is set to 1.
Make sure you send a command format that writes 0 to the sensor amplifiers again after 
receiving a response format.
*4 The command is executed only when the setting of the amplifier is changed from 0 to 1. To 
execute the command again, write 0 once and then write 1, or the command is not executed.
*5 Regardless of the display mode specified on the sensor amplifiers, the range of configurable 
data is the same as the "rESo" mode.
*6 When setting this value to 000.0, no alarm output is made even if the temperature falls below the 
indicated temperature setting lower limit; an alarm output is made only when the temperature 
exceeds the upper limit.
*7 When setting this value to 100.0, no alarm output is made even if the temperature exceeds the 
indicated temperature setting upper limit; an alarm output is made only when the temperature 
falls below the lower limit.
*8 To read or write this data type, the analog output of the sensor amplifiers must be set to "Free 
range analog" (using data number 051).
Changing the Free range analog upper limit/lower limit is invalid when the analog output is set to 
"Standard".
*9 When not performing zero cut (OFF setting), set the data to 0.
*10 Set the low density zero cut function to ON (Data No. "058").
When the low density zero cut level is set to OFF, the zero cut level is invalid even if it is set.
*11 This item is reflected during initial reset (data number 060).
052
Free range analog lower limit
*8
*** **** **.* 000 to 400
0000 to 2000
 (last 1 digit 
is fixed to 0)
0000 to 4000
 (last 1 digit 
is fixed to 0)
00.0 to 16.0 00.0 to 40.0
053
Free range analog upper limit
*8
054
Keylock function *
0: Unlock
1: Locked
055
Integrated flow quantity unit 
(Corresponding to the A-Ver)
*
1: 0.01 
(1L(Foc) only)
2: 0.1
3: 1
4: 10
5: 100
6: 1000
2: 0.1
3: 1
4: 10
5: 100
6: 1000
7: 10000
2: 0.1 
(8L(Foc) only)
3: 1
4: 10
5: 100
6: 1000
7: 10000
0: 0.001
1: 0.01
2: 0.1
3: 1
4: 10
5: 100
1: 0.01
2: 0.1
3: 1
4: 10
5: 100
056
Display averaging **.* '00.0 to 10.0 (0.5 increments)
057
Zero cut level ***.* **** **.**
000.0 to 
400.0
*9
0000 to 
2000
*9
0000 to 
4000
*9
00.00 to 
16.00
*9
00.00 to 
40.00
*9
058
Density zero cut function
*10
*
0: OFF
1: ON
059
Density zero cut level
*10
*.** 0.01 to 2.00
060
Request initial reset(ALL) * 0o1: initial reset (ALL) *11 will also be reflected
066
Volume/weight flow quantity 
selection
*11
*
0: Weight flow quantity
1: Volume flow quantity (Specified density)
2: Volume flow (Instantaneous density)
067
Towa rds f low
*11
*
0: std
1: vEv
070
Specified focus
*11
*
0: OFF
1: ON
Data 
number
Data name
Data format
*1
Data range
0.2L 1L, 2L 8L, 20L 0.2L 1L 2L 8L 20L
Parameters of Commands and Responses
■ Control outputs
This parameter is used with communication command "MS" and DRQ input. Specify the ON/OFF 
state of the control output, integrated pulse output, and error alarm output using a one-digit value 
(ASCII character).
■ Error numbers
The following table lists the error numbers that are returned as error responses when errors occur in 
the communication between DL-RS1A and FD-S Series sensor amplifiers.
Each error number is identified with two digits (ASCII characters).
Data Description
0 Outputs 1, 2, 3 OFF
1 Output 1 ON, 2 OFF, 3 OFF
2 Output 1 OFF, 2 ON, 3 OFF
3 Output 1 ON, 2 ON, 3 OFF
4 Output 1 OFF, 2 OFF, 3 ON
5 Output 1 ON, 2 OFF, 3 ON
6 Output 1 OFF, 2 ON, 3 ON
7 Outputs 1, 2, 3 ON
Error No.
Error name Problem Action
00
Invalid command 
error
An invalid command was 
received.
Make sure that the external device has 
sent a command listed in 
"Communication commands" (page 10).
20 Data length error
Data with the correct length was 
not received.
Make sure that the external device has 
sent either "CR" or "CR + LF" as a data 
delimiter.
21
Number of 
parameters error
The correct number of parameters 
for the command was not 
received.
Make sure that the number of parameters 
and the positions of the commas used as 
data delimiters conform to the command 
format shown in "Commands and 
Responses" (page 7).
22 Parameter error
·
A parameter exceeds its range of value.
·
The external device is trying to write a 
data type that cannot be written.
·
The external device is trying to read 
a data type that cannot be read.
· The data format is incorrect.
Make sure that the external device is 
sending a command listed in 
"Communication commands" (page 10).
The sensor amplifiers are being factory 
reset (initialized) or in the start-up 
process after the power is turned on.
Resend the command after the factory reset 
(initialization) or start-up process is 
complete.
The separate display unit is not 
connected to the sensor ("ErH" is 
displayed).
Check the connection to the sensor.
29 Communication error
An error was detected with RS-
232C communication.
Make sure that DL-RS1A and the external 
device have the same communication 
settings configured. For information on 
configuring DL-RS1A, refer to "(1) 
Communication setup switches" 
(page 2)
.
65 ID number error
The ID number specified with the 
command is incorrect.
Make sure that the sent data specified as 
the ID number is a 2-digit number (ASCII 
characters) according to the number of 
connected units.










