55xGenComm1_29
41
GenComm Page 7 - Accumulated Instrumentation
Registers
These are all read/write registers.
Register
offset
Name Mini value Max value Scale
factor
Units Bits/
Sign
0-1 Current time since 1/1/70 0 4.29 x10
9
1 Secs 32
2-3 Time to next maintenance -2.14 x10
9
2.14 x10
9
1 Secs 32S
4-5 Time of next maintenance
since 1/1/70
0 4.29 x10
9
1 Secs 32
6-7 Engine run time 0 4.29 x10
9
1 Secs 32
8-9 Positive KW hours 0 4.29 x10
9
0.1 KW hour 32
10-11 Negative KW hours 0 4.29 x10
9
0.1 KW hour 32
12-13 KVA hours 0 4.29 x10
9
0.1 KVA hour 32
14-15 KVAr hours 0 4.29 x10
9
0.1 KVAr hour 32
16-17 Number of starts 0 99999 32
18-255 Reserved
NOTE:- Positive KW hours, negative KW hours, KVA hours and KVAr hours values
can only be read from a 550 or 555 module fitted with the Power measurement option. This is also
sometimes referred to as “Enhanced instrumentation”.
Attempting to read these values from a “basic” instrumentation module will return an
“unimplemented” response.
NOTE:- Time to next maintenance and Time of next maintenance is not available
on pre version 2.0 550 / 555 modules.
Attempting to read these values from a version 1.x module will return
“unimplemented”.
NOTE:- Number of starts is not available on pre version 3.0 550 / 555 modules.
Attempting to read number of starts from a version 1.x or 2.x module will return
“unimplemented”.