GE Industrial Solutions CP2725AC54TE - Manual (Page 13)

GE
Data Sheet
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277V
AC
input; Default Outputs: ±54V
DC
@ 2725W, 5V
DC
@ 4W
January 30, 2014 ©2013 General Electric Company. All rights reserved. Page 13
 Invalid data
 PEC error
Vout_Command (21h) : This command is used to change the
output voltage of the power supply. Changing the output
voltage should be performed simultaneously to all power
supplies operating in parallel using the Global Address
(Broadcast) feature. If only a single power supply is instructed
to change its output, it may attempt to source all the required
power which can cause either a power limit or shutdown
condition.
Software programming of output voltage overrides the set
point voltage configured during power_up. The program no
longer looks at the ‘margin pin’ and will not respond to any
hardware voltage setting. The default state cannot be
accessed any longer unless power is removed from the DSP.
To properly hot-plug a power supply into a live backplane, the
system generated voltage should get re-configured into either
the factory adjusted firmware level or the voltage level
reconfigured by the margin pin. Otherwise, the voltage state
of the plugged in power supply could be significantly different
than the powered system.
Voltage margin range: 42V
DC
– 58 V
DC
.
A voltage programming example: The task: set the output
voltage to 50.45V
DC
The constants for voltage programming are: m = 400, b and R
= 0. Multiply the desired set point by the m constant, 50.45 x
400 = 20,180. Convert this binary number to its hex equivalent:
20,180b = 4ED4h. Transmit the data LSB first, followed by MSB,
0 x D44Eh.
Vout_OV_fault_limit (40h) : This command sets the Output
Overvoltage Shutdown level.
Manufacturer-Specific PMBus TM Commands
Many of the manufacturer-specific commands read back more
than two bytes . If more than two bytes of data are returned,
the standard SMBus TM Block read is utilized. In this process, the
Master issues a Write command followed by the data transfer
from the power supply. The first byte of the Block Read data
field sends back in hex format the number of data bytes,
exclusive of the PEC number, that follows. Analog data is
always transmitted LSB followed by MSB. A No-ack following
the PEC byte signifies that the transmission is complete and is
being terminated by the ‘host’.
Read_status (D0h) : This ‘manufacturer specific’ command is
the basic read back returning STATUS and ALARM register
data, output voltage, output current, and internal temperature
data in a single read.
1 8 1 8 1
S Slave address Wr A Command Code A
1 8 1 8 1
Sr Slave address Rd A Byte count = 9 A
8 1 8 1 8 1
Status-2 A Status-1 A Alarm-2 A
8 1 8 1 8 1
Alarm-1 A Voltage LSB A Voltage MSB A
8 1 8 1 8 1 1
Current A Temperature A PEC NA P
Status and alarm registers
The content and partitioning of these registers is significantly
different than the standard register set in the PMBus™
specification. More information is provided by these registers
and they are accessed rapidly, at once, using the ‘multi
parameter’ read back scheme of this document. There are a
total of four registers. All errors, 0 – normal, 1 – alarm.
Status-2
Bit Title Description
7 PEC Error Mismatch between computed and
transmitted PEC. The instruction has
not been executed. Clear_Flags
resets this register.
6 Will Restart Restart after a shutdown = 1
5 Invalid Instruction The instruction is not supported. An
ALERT# will be issued. Clear_Flags
resets this register.
4 Power Capacity High line power capacity = 1
3 Isolation test
failed
Information only to system controller
2 Restarted ok Informs HOST that a successful
RESTART occurred clearing the status
and alarm registers
1 Data out of range Flag appears until the data value is
within range. A clear_flags
command does not reset this register
until the data is within normal range.
0 Enable pin HI State of the ENABLE pin, HI = 1 = OFF
Isolation test failed: The ‘system controller’ has to determine
that sufficient capacity exists in the system to take a power
supply ‘off line’ in order to test its isolation capability. Since the
power supply cannot determine whether sufficient redundancy
is available, the results of this test are provided, but the
‘internal fault’ flag is not set.
Status-1
Bit Title Description
7 spare
6 Isolation test OK Isolation test completed successfully.
5 Internal fault The power supply is faulty
4 Shutdown
3 Service LED ON ON = 1
2 External fault the power supply is functioning OK
1 LEDs flashing LEDs tested test ON = 1
0 Output ON ON = 1
Alarm-2
Bit Title Description
7 Fan Fault
6 No primary No primary detected
5 Primary OT Primary section OT
4 DC/DC OT DC/DC section OT
3 Output voltage
lower than bus
Internal regulation failure
2 Thermal sensor
failed
Internal failure of a temperature
sensing circuit
1 5V out_of_limits Either OVP or OCP occurred
0 Power delivery a power delivery fault occurred
Power Delivery: The power supply compares its internal
sourced current to the current requested by the current share
pin. If the difference is > 10A, a fault is issued.