Signal Concept, PSM, Function - GF54.21-D-2000P
MODEL 906 with CODE ED5 (Parameterizable special module (PSM)) with CODE XM0 (Facelift)
MODEL 906 with CODE ED8 (Preinstallation for parameterizable special module (PSM)) with CODE XM0 (Facelift)
Signal flow in PSM control unit, shown on model 906 with code (ED5) Parameterizable special module (PSM)
Signal pool
A signal is an internal value which the PSM control unit can process. It is comparable to a variable.
Approx. 670 signals with various content are available to the user via the signal pool in the PSM control unit.
Each signal has a unique four-digit number, the signal ID. Each signal ID is, in turn, assigned to a brief descriptive text, which provides information on the content of the signal.
The signals can be assigned via the signal ID to the internal inputs of the modules of the PSM with XENTRY Diagnostics. It is possible to link a signal to several internal inputs (1: n), also across different modules.
The signal is unique and there is only ever one signal source which can change the content of the signal. Example: Signal #1013 (input 01) contains 1:1 the value of digital input 01 of the interface module "Inputs".
Other possible signal sources include:
- Analog and digital inputs
- CAN signals from interior CAN
- CAN signals from body manufacturer CAN
- Internal signals from PSM modules (e.g. outputs of PLC logic modules)
Signal types
The following signal types exist:
- Bit information (e.g. Tml. 15)
- 1-byte information (e.g. V-signal (vehicle speed signal)), (0 to 255)
- 2-byte information (e.g. motor speed), (0 to 65 535)
- Multi-byte information as pointer (e.g. vehicle identification number (VIN))
Special signals
The following special signals exist:
- "Permanent LOW" signal, gives a logical "0" at the input at which the signal is applied.
- "Permanent HIGH" signal, gives a logical "1" at the input at which the signal is applied.
- Signal "Inquiry deactivated", deactivates the inquiry of this input (e.g. conditions for working speed control).
| Parameterizable special module (PSM) control unit component description | GF54.21-D-5005P |