Operating Instructions – MOVITRAC® LT Option Cards
17
4
Operation
Second Analog Input
4.5 Operation
4.5.1 Switching between a voltage and a current speed reference
• Connect the voltage signal to terminal 6 and the current signal to terminal 7 of the
option module.
– Each of these signals is referenced to terminal 9 (0 V).
– The digital signal used to switch between the voltage and current inputs should
be connected to terminal 4 (digital input 3).
• Set the parameters as follows:
– P-19 = 0
– P-16 = 4–20mA (or 0–20mA / 20–4mA, depending on required format)
4.5.2 Hand – Off – Auto-operation
• Connect the required analog reference signals to terminals 6 and 7 as described
above. This mode of operation requires a 2-pole change-over, centre-off switch.
– The first pole of the switch is used to enable the drive, where both "Hand" and
"Auto" positions should be connected to digital input 1.
– The second pole of the switch is connected to digital input 3, as described above.
• Connect the common connection point of each of the switches to terminal 1 (0 V).
• In a typical configuration, "Hand" will enable the drive using the voltage (local) refer-
ence, "Auto" will enable the drive using the current (remote) reference.
TIP
When digital input 3 is open, the voltage format signal (connected to terminal 6) will be
selected.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
To Next Page
Loading...