ELM327LSM datasheet(72/94 Pages) ELM

72 / 94 page

Power Control options (continued)

b1: Ignition delay

0: 1 sec

1: 5 sec

delay after IgnMon (pin 15) returns to a high level, before

normal operation resumes

b0: reserved for future - leave set at 0

Programmable Parameter Summary (continued)

J1850 voltage settling time

setting (in msec) = (PP 10 value) x 4.096

(53 msec)

00 to FF

(11010101)

00 to FF

Activity Monitor options

Each bit controls an option, as follows:

b7: monitor master control

0: disabled

1: enabled

must be 1 to allow b3 to b6

b6: allow wake from Low Power

0: no

1: yes

wakes on shift from no activity to activity

b5: Auto LP control

0: disabled

1: enabled

allows low power mode if the OBD activity stops

b4: Auto LP timeout

0: 30 secs

1: 150 secs

no OBD activity timeout setting

b3: Auto LP warning

0: disabled

1: enabled

if enabled, says ‘ACT ALERT’ on timeout

b2: reserved for future - leave set at 1

b1: add exclamation mark

0: no

1: yes

if 1, sends ‘!’ before ACT ALERT and LP ALERT

b0: LP LED

0: disabled

1: enabled

if 1, the OBD Tx LED flashes when in Low Power mode

(one 16 msec flash repeated every 4 seconds)

ELM327L

ELM327L DSA

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Description

Values

Default

Type

J1850 Break Signal monitor enable

(reports BUS ERROR if break signal duration limits are exceeded)

(ON)

00 = ON

FF = OFF

J1850 Volts (pin 3) output polarity

normal = Low output for 5V, High output for 8V

invert = High output for 5V, Low output for 8V

00 = invert

FF = normal

(normal)

Time delay added between protocols 1 & 2 during a search

setting (in msec) = 150 + (PP 13 value) x 4.096

(498 msec)

00 to FF

ISO/KWP final stop bit width (provides P4 interbyte time)

setting (in µsec) = 98 + (PP 14 value) x 64

(5.2 msec)

00 to FF

ISO/KWP maximum inter-byte time (P1), and also used for

the minimum inter-message time (P2).

setting (in msec) = (PP 15 value) x 2.112

(21 msec)

00 to FF

ELM327LSM Datasheet(PDF) 72 Page - ELM Electronics

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