Rockwell Automation 1405-M620 Operating Instructions - Manual (Page 18)

Publication 1405-IN002C-EN-P - November 2004
18 Bulletin 1405 (M620) Operating Instructions
built into the instrument. This number should be stated if and when
information or technical assistance is requested relating to this
instrument.
E
P
cos ϕ
A
V
+ F
Version number displayed at start
Under- and overvoltage alarm indication: If any of the phase
voltages cross either of the user-programmed undervoltage or
overvoltage limits, not only is the alarm relay activated, but also the
alarm condition is indicated on the instrument display panel. An
undervoltage condition causes the character “u” to blink in the
left-most digit position to the left of the corresponding phase voltage
display. An overvoltage condition is similarly indicated by the blinking
character “o”. These alarm indications are independent of the
measuring range.
E
P
cos ϕ
A
V
+ F
E
P
cos ϕ
A
V
+ F
Under and overvoltage alarm
indication
Enabling / disabling the auto-sequencing display mode and
re-setting peak values: The “+” key has three functions, depending
on the duration for which this key is pressed, and indicated by a
function character at in the bottom left digit position. These functions
are selected sequentially when this key is kept pressed for different
durations.