KEPCO MBT Series - Manual (Page 62)

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MBTSVC111609
3.1.1 and 3.1.2 for more details regarding commanded and actual mode of operation (either volt-
age or current).
The slew keys are not operational when the power supply is in Remote mode, when you enter
the MENU (PAR. 3.2.2), or PROGRAM REV/CHG (PAR. 3.2.1.11.1) functions, or when a pro-
gram is running (PAR.s 3.2.1.11.3 and 3.2.1.11.5).
Table 3-12 shows that with the power supply commanded to operate in Voltage mode, the slew
keys have no effect on current or current limit.
If the power supply is commanded to operate in a Current mode and the output is disabled, the
slew keys adjust programmed output current. If the output is enabled and the load permits the
power supply to operate in Current mode, the slew keys adjust actual output current; if the load
forces the power supply to operate in Voltage mode, the slew keys adjust actual current limit.
Pressing the key increases the output current/current limit (see Table 3-12) by the slew key
I range value which was previously set using the MENU (see PAR. 3.2.2). For example, if the
current limit is 1.0A (Current mode, output enabled), and the slew key I range value is 0.10A,
pressing the key twice changes the output current to 1.2A. The key operates similarly to
decrease current limit by the slew key I range value.
3.2.1.7.6 CURRENT CONTROL — M, MG MODELS
As described in PAR. 3.2.1.7.1 above for the Iadj and numeric keys, the effect of the CURRENT
control is dependent upon model, commanded mode, output enabled, actual mode, and the
load.
Table 3-13 (M, MG Models) summarizes the effect of the CURRENT control adjustments for dif-
ferent conditions. The first three columns reflect the status of the unit before the CURRENT con-
trol is adjusted. The fourth column shows how the adjustment will affect the status of the power
supply. Refer to PAR.s 3.1.1 and 3.1.2 for more details regarding commanded and actual mode of
operation (either voltage or current).
TABLE 3-12. USING SLEW KEYS ( AND ) TO SET OUTPUT
CURRENT/CURRENT LIMIT — MODELS MR, MGR
POWER SUPPLY STATUS BEFORE SLEW KEY ADJUSTED
SLEW KEYS
ADJUST: COMMANDED
MODE
OUTPUT
ENABLED/
DISABLED
ACTUAL MODE **
(DICTATED BY LOAD)
VOLTAGE Either DISABLED
or ENABLED Either VOLTAGE
or CURRENT No effect on current
CURRENT DISABLED CURRENT**** Programmed output current
CURRENT ENABLED CURRENT Actual output current
CURRENT ENABLED VOLTAGE *** Actual Current limit *
* Overload” error message placed in error buffer (for use when operating in Remote mode).
** Actual mode is indicated by the VOLTAGE MODE and CURRENT MODE status LED’s.
*** Condition where load forces power supply mode.
**** Forced by the power supply.