Operation Manual

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ELM327
ELM327DSJ Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
Programmable Parameter Summary (continued)
16 Default ISO/KWP baud rate (AT IB default setting)
Note: 4800 baud can not be a default - set it with AT IB 48
FF
(10.4K)
R
ISO/KWP wakeup message rate (AT SW default setting)
setting (in msec) = (PP 17 value) x 20.48
D
18 I
24 CAN auto formatting (AT CAF default setting) D
25 D
CAN filler byte (used to pad out messages) 00
17
ISO/KWP delay before a fast init, if a slow init has taken place
setting (in msec) = 1000 + (PP 18 value) x 20.48
31
(2.0 sec)
CAN auto flow control (AT CFC default setting)
92
(3.0 sec)
00
(ON)
00
(ON)
PP Description Values Default Type
00 to FF
00 to FF
00 to FF
00 = 96
FF = 10
00 = ON
FF = OFF
00 = ON
FF = OFF
26 D
19 I31
(2.0 sec)
00 to FF
21 Default CAN Silent Monitoring setting (for AT CSM) RFF
(ON)
FF = ON
00 = OFF
Protocol 5 fast initiation active time (TiniL)
setting (in msec) = (PP 1A value) x 2.5
D1A 0A
(25 msec)
00 to FF
ISO/KWP outputs used for initiation (b7 to b2 are not used)
b1: L line (pin 22) 0: disabled 1: enabled
b0: K line (pin 21) 0: disabled 1: enabled
If disabled, an output will remain low during protocol initiations
D1C 00 to FF
ISO/KWP P3 time (delay before sending requests)
Ave time (in msec) = (PP 1D value - 0.5) x 4.096
D1D 0F
(59 msec)
00 to FF
Protocol 5 fast initiation passive time (TiniH)
setting (in msec) = (PP 1B value) x 2.5
D1B 0A
(25 msec)
00 to FF
03
(00000011)
ISO/KWP K line minimum quiet time before an init can begin (W5)
setting (in msec) = (PP 1E value) x 4.096
D1E 4A
(303 msec)
00 to FF
ISO/KWP delay before a slow init, if a fast init has taken place
setting (in msec) = 1000 + (PP 19 value) x 20.48
28 FF
(11111111)
00 to FF DCAN Filter settings (controls CAN sends while searching)
The bits of this byte control options, as follows:
b7: 500 kbps match 0: ignored 1: required
b6: 250 kbps match 0: ignored 1: required
b5 to b1: reserved for future - leave set to 1
b0: send if bus is quiet 0: not allowed 1: allowed
29 Printing of the CAN data length (DLC) when printing header bytes
(AT D0/D1 default setting)
DFF
(OFF)
00 = ON
FF = OFF