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MicroHarmony Cell Sizes 40 - 260A Manual
11.6 Cell Data
The following tables define the Perfect Harmony Modulator/CCB communication data bytes where bit 0 is the least
significant bit (LSB). Table A-3 shows the information that flows from the Modulator card to the CCB. Table A-4
shows the CCB response message for each of the 4 data modes. The Operating Mode is controlled by the Harmony
microprocessor where Mode '00' is the default mode. Modes '01', '10', and '11' are used for diagnostic purposes
only. All data sent to the CCB is processed by the Cell Control Gal (U31), therefore the functionality of these 'Up'
bits are totally dependent on the GAL logic.
'Up' Bits
0
0
1
0
2
Enable Output
3
Enable Left Pole
4
Enable Right Pole
5
Bypass Request
Temperature Sync
6
Reference
7
Parity
'Down' Bits
0
0
1
0
2
Cell Fault
3
Low DC Bus Voltage
Cell Temperature
4
Feedback Signal
5
Control PWR OK
6
Bypass Acknowledge
7
Parity
Note that the CCB is responsible for latching all CCB initiated fault conditions so that the Perfect Harmony CPU can
properly determine the cause of any CCB faults when cell diagnostics are performed. These CCB faults must remain
latched until a Cell Fault Reset is received by the CCB (bit 2 of Mode '01' or '10'). The parity bit is "stripped off" at
the FOLA before getting to the Modulator cell data registers, and replaced with the OR'ed value of the parity fault
and the link fault (CommFault).
19001467: Version 1.0
Table 11-3: Modulator to CCB Data ('Up' Bits)
Mode '00'
Mode '01'
1
0
Fault Reset
0
0
0
Temperature Sync
Reference
Parity
Table 11-4: CCB to Modulator Data ('Down' Bits)
Mode '00'
Mode '01'
1
0
OOS Fault
Not Over Voltage
Fault
Not Under Voltage
Fault
Not Cap Sharing Fault Q4 OOS OK
CCB Communication
OK
Parity
s
Communication Protocol
Mode '10'
Mode '11'
0
1
1
1
Fault Reset
Test Enable
0
Device Test A
0
Device Test B
0
Not Test Enable
Temperature Sync
Temperature Sync
Reference
Reference
Parity
Parity
Mode '10'
Mode '11'
0
1
1
1
Q1 OOS OK
Q1 Blocking
Q2 OOS OK
Q2 Blocking
Q3 OOS OK
Q3 Blocking
Q4 Blocking
Bypass Option
Output Fuse OK
Available
Parity
Parity
11
11-3
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