6
●
Communications cable specification and connection
■
Function list
●
Error indication and correction
●
Communications commands
Handling Precautions
• Underscores ( ) in the send examples stand
for spaces.
• The following example shows a response if an
error occurs.
NG (CR/LF)
21:illegal type
@A
Function:
Reads out the current flow rate
(channels 1-4).
Command example: @A (CR/LF)
Response example: 1=-3.00 (CR/LF)
2=3.00 (CR/LF)
(CR/LF)
←
This shows that no sensor is
connected to ch. 3.
4=0.00 (CR/LF)
(CR/LF)
@PRE
Function:
Sets the ON/OFF point for any channel.
Command example: @PRE11
-3.00 (CR/LF)
Response example: OK (CR/LF)
@PRE11: Channel 1, L1/
∆
L setting
@PRE12: Channel 1, L2 setting
@PRE21: Channel 2, L1/
∆
L setting
@PRE22: Channel 2, L2 setting
@PRE31: Channel 3, L1/
∆
L setting
@PRE32: Channel 3, L2 setting
@PRE41: Channel 4, L1/
∆
L setting
@PRE42: Channel 4, L2 setting
@HYS
Function:
Sets the hysteresis width for any
channel.
Command example: @HYS11
0.02 (CR/LF)
Response example: OK (CR/LF)
@HYS11: Channel 1, hysteresis width setting
@HYS21: Channel 2, hysteresis width setting
@HYS31: Channel 3, hysteresis width setting
@HYS41: Channel 4, hysteresis width setting
@P
Function:
Sets trigger signal for memorizing
reference flow value is enabled or not,
when window comparator mode 2 or 3
is selected as the operation mode.
Command example: @P1 (CR/LF)
Response example: OK (CR/LF)
@P1: Trigger signal for memorizing reference flow value
is enabled at channel 1
@P2: Trigger signal for memorizing reference flow value
is enabled at channel 2
@P3: Trigger signal for memorizing reference flow value
is enabled at channel 3
@P4: Trigger signal for memorizing reference flow value
is enabled at channel 4
@MODE
Function:
Sets the operation mode for any
channel.
Command example: @MODE1
1 (CR/LF)
Response example: OK (CR/LF)
@TYPE
Function:
Sets the flow sensor type for any
channel.
Command example: @TYPE1
1 (CR/LF)
Response example: OK (CR/LF)
@TYPE1 1
1: Ch. 1
2: Ch. 2
3: Ch. 3
4: Ch. 4
1: -3.00 to +3.00L/min
2: 0.00 to 3.00L/min
3: -500 to +500mL/min
4: 0 to 500mL/min
5: 0.00 to 10.00L/min
]
@MODE1 1
1: Ch. 1
2: Ch. 2
3: Ch. 3
4: Ch. 4
1: Window comparator mode 1
2: Window comparator mode 2
3: Window comparator mode 3
4: Window comparator mode 4
]
@P1
1: Ch. 1
2: Ch. 2
3: Ch. 3
4: Ch. 4
@HYS1 1
1: Ch. 1
2: Ch. 2
3: Ch. 3
4: Ch. 4
1 fixed
]
@PRE1 1
1: Ch. 1
2: Ch. 2
3: Ch. 3
4: Ch. 4
1: L1/
∆
L
2: L2
]
]
Error details
Error indication
Correction method
(“n” shows relevant channel.)
(“n” shows relevant channel.)
OFF
E-
1
E-2
n
n
E-3
Flow sensor of the selected
channel is not connected or
wiring is faulty.
Replace the flow sensor
after turn OFF the power
or the cable.
After correcting the
error, keep the mode key
pressed for 1 second
or longer.
Threshold flow value
beyond the measurement
range is set in window
comparator mode 2 or 3.
Excessive voltage (5V or
more) is input to the sensor
(channels 1-4).
Output current is excessive.
Signal name
DC24V
GND
SW1
SW2
SW3
SW4
SG
RXD
TXD
N.C
N.C
Pin No.
1
2
3
4
5
6
7
8
9
10
11
Signal name
D.G
DCD
RXD
TXD
DTR
DSR
RTS
CTS
Pin No.
5
1
2
3
4
6
7
8
This device
Personal computer side
D-sub 9-pin configuration
Serial communications
cable
Power and output cable
Signal name
DC24V
GND
SW1
SW2
SW3
SW4
SG
RXD
TXD
N.C
N.C
This device
Personal computer side
D-sub 25-pin configuration
Pin No.
1
2
3
4
5
6
7
8
9
10
11
Signal name
D.G
TXD
RXD
RTS
CTS
DSR
DCD
DTR
Pin No.
7
2
3
4
5
6
8
20
Serial communications
cable
Power and output cable
Function
Key
RS-232C
operation
command
Instantaneous flow rate indication
Yes
@A
L1 (
∆
L) / (L2) settings
Yes
@PRE
Hysteresis settings
Yes
@HYS
Trigger signal for memorizing
Yes
@P
reference flow value
Operation mode selection
Yes
@MODE
Flow sensor selection
Yes
@TYPE
Zero reset setting
Yes
@B
Auto-scanning indication
Yes
@AS
Output mode setting
Yes
@INV
(only for comparator mode 4)
Peak hold setting
Yes
@PHL
Bottom hold setting
Yes
@BHL
Indication on/off
Yes
@DIS
Operation mode confirmation
No
@MD
Flow sensor type confirmation
No
@TP
L1 / L2 confirmation
No
@C
Threshold flow value confirmation
No
@E
(only for modes 2 and 3)
Output status confirmation
No
@SW
Switch output response time setting
Yes
@DLY
Switch output response time confirmation
No
@SD
Flow rate display moving average setting
Yes
@FIL
Flow rate display moving average confirmation
No
@F
