Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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Please observe the revision notes compared to 09/18/2015 ! Only print out complete sections of the current version!
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9.8 Parameterizable special module (PSM)
9 Electrical system
9.8.2 PSM interfaces
•
I/O module
E
10 parameterizable inputs
E
19 parameterizable outputs
•
Logic functions (mini-PLC)
The mini-PLC (mini programmable logic controller)
is a module with freely programmable and freely
interconnectable function blocks for creating any
signal links that may be required:
E
96 AND/NAND/OR/EXOR/NOR/EXNOR gates
E
24 RS and D flip-flops
E
12 retriggerable/non-retriggerable timer stages
E
12 hysteresis elements with adjustable thresh-
olds
E
24 threshold switches with 3 stages
E
12 counters
•
Arithmetic unit
E
20 calculating blocks
E
8 filters
E
8 integrators/differentiators
E
8 comparators
E
4 characteristics
E
16 non-volatile memory options
E
20 freely definable constants
9.8.3 ABH-CAN
A second CAN bus is available on the PSM:
The upfitter CAN (ABH-CAN).
•
High-speed CAN Class C
•
Extended CAN identifier (29-bit)
E
Baud rate can be toggled between 250 kbit/s
and 125 kbit/s
E
Signal format: Intel (LSB first)
E
All bus content can be activated separately and
independently through parametrization:
- Fleet management system - FMS
(send direction only)
- ISO11992-2 and 3 (abridged)
- Freely assignable messages (J1939)
i
Additional information
This Body & Equipment Guideline cannot describe
in full the wide variety of capabilities of the PSM.
You can obtain additional information in the
PSM function description and from PSM Support
(
