Kodak DryView 8150, Руководство по обслуживанию, Страница: 228 / 470

Service Manual
6-26
7F3318 2005 July Rev. B
6-4-4-4. Densitometer Control Functions
The MCS software that controls densitometer functions implements the following commands:
Reset Densitometer Module ----This command reinitializes the A/D converter and resets its counters and
flags.
Arm for Dpatch ----This command:
•
Monitors the Exit Sensor to detect the leading and trailing edges of the film.
•
Calculates the average density from the raw readings and reports the results to MPC and Gray Scale
Manager (GSM) logs.
Report Dpatch Value ----This command reports the calculated average density value.
Arm for Step Wedge ----This command:
•
Monitors the Exit Sensor to detect the leading and trailing edges of the film.
•
Calculates the average density from the raw readings.
Report Step Wedge Value ----This command reports the calculated average density of the step.
Execute Diagnostics ----This command:
•
Reads the densitometer with the light source off and sets the dark offset to the raw value.
•
Reads the densitometer with the light source on and sets the light offset.
•
Compares the dark and light offsets. If the difference between the two values is insufficient, sets the
Densitometer Failure Error bit.
•
Reads the Exit Sensor every 3 seconds and reports status.
Read Raw Densitometer Value ----This command reads the current raw value form the A/D Converter
every 16 ms and reports status on request.
Turn Light Source On ----Turns the light source on.
Turn Light Source Off ----Turns the light source off.
6-4-5. RF TAG SUBSYSTEMS
The RF TAG SUBSYSTEM installed on the ROLLBACK MODULE reads cartridge ID information from the
RF TAG on the bottom of the FILM CARTRIDGE and reports it to the MCS. It can also write data from the
MCS onto the RF TAG. Each TAG contains space for 2K bits of data , which are divided into 62 blocks of
4 bytes each (with 64 bits remaining for special use). Blocks 0 - 4 (bits 0 - 159) contain the following
information, sent from the factory with the FILM CARTRIDGE:
•
A TAG ID
•
5 bytes of TAG “details” indicating the number of blocks on the TAG and the number of bytes per
block
•
The number of sheets of film in the CARTRIDGE. (This number is decremented by the IMAGER as
film is used.)
The remaining blocks (5 - 62) on the TAG are used to store the following data, written to the TAG by the
IMAGER:
•
Model and serial numbers of the IMAGER
•
Print count
•
MCS FIRMWARE version number