Blink Marine PKP-2400-LI, Руководство пользователя

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Via Montefeltro, 6 – 20156 Milano (MI) – Italy - 13 -
Tel. +39 (02) 3088583 – Fax +39 (02) 33406697
www.blinkmarine.com – info@blinkgroup.com
PKP-2400-LI_J1939_UM_REV1.0
19. Heartbeat (75h)
This message enables or disables the transmission of Heartbeat message. This
message is designed to indicate to other devices on the bus that this unit continues
to function.
Byte 0
04h Header bytes
Byte 1
1Bh
Byte 2
75h Heartbeat
Byte 3
XXh XX:
00h Disabled (default)
01h Enabled
Byte 4
YYh YY: Period in milliseconds ÷ 10
From 05h (50ms) to FEh (2.54 sec)
Byte 5,7
FFh Not used
Example:
Direction Identifier Format Message Data
To
Keypad
18EF2100h Ext 04 1B 75 01 32
FF FF FF Set heartbeat
enabled with 500ms
period.
Heartbeat generated message:
Byte 0
04h Header bytes
Byte 1
1Bh
Byte 2
F9h Heartbeat message
Byte 3
XXh XX: Message counter, incremented each
message sent
Byte 4
K8 K7 K6 K5 K4 K3 K2
K1 Button state indicators
Each bit represents a button state
0: OFF
1: ON
Byte 5
00 00 00 00 00 00 00
00
Byte 6,7
FFh Not used
Example:
Direction Identifier Format Message Data
From
Keypad
18EFFF21h Ext 04 1B F9 03 02 00
FF 21 Heartbeat
message with
button 2 pressed.
From
Keypad
18EFFF21h Ext 04 1B F9 03 80 00
FF 21 Heartbeat
message with
button 8 pressed