
6
COMMAND
DESCRIPTION
RANGE
FORMULA
0h
Enter Command Mode
See Command Mode and Device
Identification sections
1h
8 bit
λ
0.744 to 1.235
λ
= (Data Byte + 186)/250
2h
16 bit
λ
High Byte
0.549 to 1.235
λ
= (High Byte*256 + Low Byte)/1000
3h
16 bit
λ
Low Byte
4h
16 bit Ri High Byte
0 to 400
Ω
Ri = (High Byte*256 + Low Byte)/10
5h
16 bit Ri Low Byte
6h
16 bit %O
2
High Byte
0.0 to 4.03
%O
2
= (High Byte*256 + Low Byte)/100
7h
16 bit %O
2
Low Byte
8h
16 bit AFR High Byte
8.0 to 18.0
AFR = (High Byte*256 + Low Byte)/100
9h
16 bit AFR Low Byte
Ah
16 bit FAR High Byte
0.055 to 0.125
FAR = (High Byte*256 + Low Byte)/10000
Bh
16 bit FAR Low Byte
Ch
16 bit Ip High Byte
-2849 to 492
µ
A
Ip = (High Byte*256 + Low Byte)/10
Dh
16 bit Ip Low Byte
Eh
N/A
F/A1500 Status Code (See table below)
Fh
N/A
PWR (Green) LED
ERR (Red) LED
FLASH CODE
STATUS CODE
CONDITION
ON
OFF
0
Data valid/Sensor OK
OFF
1
1
Sensor not connected or
heater open
OFF
2
2
Heater short
OFF
3
3
Power supply voltage
out of range
OFF
4, 5, or 6
4, 5, or 6
Sensor damaged
Flashing
OFF
8
30 second
warm-up
ON
ON
9
EE Fault
ON
ON
ON
Command Mode
Command Mode
Command Mode is used to auto-detect F/A1500 and AFM1500 modules on the SMB bus.
After the reception of command XXXX 0000 (where XXXX = module address) the module
switches into Command Mode and waits for a second byte. Upon entering Command Mode,
wait 30 ms minimum before issuing commands.
The sensor is powered off when the unit
is in Command Mode.
The module remains waiting until a second byte with the correct
device number in the high-nibble is received.
Summary of Contents for F/A1000
Page 1: ...F A1000 F A1500 Fuel Air Ratio Monitor Instruction Manual 02 06 Part Number 1001A 6...
Page 4: ...ii Supplementary Information 15...
Page 19: ...15...
Page 20: ...16...
Page 21: ...17...
Page 22: ...18...
Page 23: ...19 State Diagram for SMB Communication...
Page 24: ...20...
Page 25: ......
Page 26: ...Los Altos CA 94023 0040 USA 408 734 3433 Fax 408 734 3432 www ecm co com...