Alstom GEM80-500 Series, Technical Manual, Page: 126 / 140

7. Maintenance and Fault Finding GEM80-500 Series Controller
GEM80-500 Technical Manual (T2025En) (08/04) Page 7-26
7.18 V-Data Tables
The majority of the locations in the V-table are for system internal functions and have
no significance for the user. However, a few are useful and these are described at
Table 7-12.
Table 7-12 V-Table
Address Content Remarks
V0 Not used -
V1 Compilation count,
moving flag.
Low byte contents are incremented after each
successful compilation.
V1.8 =1 Moving ( See note 1 ).
V2 to
V47 Used by system software
for data table offsets and
lengths -
V48 to
V51 Reserved for system usage -
V52 Length of the message
area in bytes -
V53 to
V57 Reserved for system usage -
V58 V-table checksum -
V59 User program checksum -
V60 P-table checksum -
V61 FIP network subscriber
address (if present) -
V62 Front Panel Switch setting This is read once when the controller is powered up.
V63 Always 0 No off-line support
V64 Firmware issue This is copied from the firmware issue in the format A
etc.
V65 to
V66 Reserved for System Usage