AMETEK ASD Series - Manual (Page 70)

Programming: Digital Interface Control Sorensen ASD Series
4-12 M551177-01 Rev A
The two low pass filters that can be programmed in the ASD unit are
monitor signals and impedance calculation.
 Monitor signals (“monitor_alpha_HI/LO” register) is used for
Vmonitor, Imonitor and Pmonitor.
 Impedance calculation (“Z_alpha_HI/LO” register) is used for
output impedance calculations.
4.3.13 EXPECTED NUMBER OF MODULES FEATURE
When this feature is enabled (switch #8 UP or from the digital interface)
the master will expect to discover a predefined number of modules. If the
number of modules is lower than the expected, the unit will generate a
fault indicating that there may be a problem with one or more modules.
This feature also fixes the analog interface scale based on the expected
number of modules, making it independent from the actual number of
modules that were discovered.
For example, if in a 60V unit the predefined number of modules is 6
(switches 6 and 4 UP), the total available output current with 6 modules
would be 1000A, so the analog interface full scale (10V or 20mA) would
be 1000A regardless of the actual number of connected modules. If there
are 3 discovered modules because the 2nd chassis was not powered-up,
the analog interface scale will be fixed based on the EXPECTED number
of modules, and the master will generate a fault because there were too
few discovered modules.
If this feature is not used, the actual number of modules discovered by the
master will define the analog interface scale. For example, three 60 V
modules give 500 A full scale, or six 60 V modules give 1000 A.
4.4
LIST OF REGISTERS
This section presents the following tables of registers:
 Write Registers, Table 4-4
 Command Register Bits, Table 4-5
 FDR_Period Register Bits, Table 4-6
 Process_Config Register Bits, Table 4-7
 EtherCAT_Config Register Bit, Table 4-8

Read Registers, Table 4-9
 Status Register Bits, Table 4-10
 Fault_Bits Register, Table 4-11
 Module_Information Register Bits, Table 4-12