Master Lock XR20 Manual de servicio descargar pdf (Pagina 83)

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1 Vom=Vo×Mod Vom=Vo+Mod

2 Iom=Io×Mod Iom=Io+Mod

Notes:

1) Vom is the adjusted output voltage as a function of the modulation operator

2) Iom is the adjusted output current as a function of the modulation operator

3) Vo is the output voltage as a function of input set point voltage

4) Io is the output current as a function of set point current

5) Mod is a value derived from a lookup table as determined by an analog interface

signal,VMOD. Mod is made continuous using a piecewise linear approximation algorithm. In

type 0 modulation, Mod is unitless. In type 1 modulation, Mod represents either a voltage or

current for control inputs 1 or 2, respectively.

Command Syntax: MODulation:TYPE:SELect <NR1>[,<NR1>]

Examples: MOD:TYPE:SEL 1,0

MOD:TYPE:SEL 2,1

MODulation:TYPE:SELect 0

Query Syntax: MODulation:TYPE:SELect?

Returned Parameters: <NR1>,<NR1>

Related Commands: None

4.3.14.2 MOD:TABL

This command programs the user defined modulation table described in Section 4.3.14.1. The

feature allows the user to program nonlinear output voltage and current profiles to fit their

application needs, such as source emulation or output adjustments with respect to an external

sensor.

The lookup table contains 4 columns and up to 50 rows; it stores an output profile as a function of

the analog input voltage applied to terminal 25 of JS1, VMOD. As shown in Table 4.4, the first

column stores the table row and the second column sets an analog input VMOD. The third

column store the Mod value associated with VMOD for that table row.

The fourth column of the lookup table, Loc, defines whether the table is stored in an active or

temporary location. Certain applications may need to transition between different tables while

the power supply is still running. For example, emulation of solar panel’s voltage/current

characteristics requires continuous external data acquisition along with quick and smooth table

loading . The modulation subsystem provides two storage locations, Loc 0 or 1, to help improve

table loading performance. With Loc set to 0, data will be stored to the Active Table, the table

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 128 129

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Master Lock XR20 Manual de servicio Pagina 83