AMETEK ASD Series User Manual
Page 61
Sorensen ASD Series
Programming: Digital Interface Control
M551177-01 Rev A
4-3
one module 10020W / 10000W. In floating point no normalization is
required when writing the desired power value.
4.2.2 READ ONLY REGISTERS
Read registers 0x0 and 0x3 - 0x8 are used to monitor the output and
status of the power supply.
R
EAD
O
UTPUT
R
EGISTERS
The voltage output is read using the Vout_HI/LO read registers (0x3
–
0x4) and the encoding is the same as the Vsetpoint_HI/LO write registers.
The current output of the power supply is read using the Ishunt_HI/LO
registers (0x5
– 0x6, same encoding as the Isetpoint HI/LO write
registers).
The power output is read using the Pout_HI/LO read registers (0x7
– 0x8,
same encoding as Psetpoint_HI/LO write registers).
R
EAD
S
TATUS
R
EGISTER
Reading the Status read register (0x0) returns the status of the power
supply; it contains the output state, fault status and regulation mode of the
power supply.
4.2.3 COMMAND WRITE REGISTERS
The command register has 12 bits that work independently with different
functionality, described as follows (refer to Table 4-4):
Bit
Function
ON
Enables the output of the unit. Only when the output of the unit is
enabled the power stages are active, otherwise they are totally off.
RESET FAULT
Clears all previous fault history when it is changed from a “0” to a “1”.
After the faults are reset, the bit value will automatically change to “0”.
REMOTE
SNS
DISABLE
Disables remote sensing for the voltage loops, and also the monitors
related to remote sensing (such as load cable impedance monitor).
ANALOG
CURRENT
Defines analog inputs and outputs to Current or Voltage. When set to
“1”, defines all analog input and outputs to current mode (4-20mA). If it
equals “0”, the analog inputs and outputs are in voltage mode (0-10V).
IMPEDANCE
MONITOR
Enables/disables the impedance monitor feature. When set to “1”, it
enables the impedance monitor feature, which generates system faults
when the output impedance or load cable impedance do not meet
certain requirements. (Section 4.3.3)
MODBUS
TIMEOUT
Monitors MODBUS activity. When set to “1”, the master controller
monitors periodic Modbus activity, with a pre-defined maximum period
of inactivity. If there is no activity after that period, a fault is generated
to indicate a possible issue with the MODBUS interface or the