Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 63)

Configuring the Speed/Voltage Loop 5-15
NEG CURRENT LIM SEL
(P.224)
Selects the source for
the negative current
limit.
If REGISTER is
selected, NEGATIVE
CURRENT LIM (P.006)
is used as the limit.
Parameter Range: REGISTER
ANALOG IN 1
ANALOG IN 2
NETW IN REG 1
NETW IN REG 2
NETW IN REG 3
Default Setting: REGISTER
Parameter Type: Configurable
OIM Menu Path(s): Speed/Voltage Loop ( SPD ) - Speed/Voltage Loop
( SPD ) Tuning
Current Minor Loop ( CML ) - CML Tuning
The I/O Expansion kit must be installed to use ANALOG IN 1 (terminals 50 and 51 on
the I/O Expansion board) or ANALOG IN 2 (terminals 52 and 53).
A network kit must be installed to select the network input registers ( NETW IN REG 1,
2, or 3). Note that the network input registers are updated only when Control
Source (P.000) is set to
NETWORK and the network is active.
This parameter is affected by NEG CUR LIM INV EN (P.226).
NEG CUR LIM INV EN (P.226)
Enables or disables
the negative current
limit inverter to the
speed loop PI block
low limit input. Parameter Range: DISABLED
ENABLED
Default Setting: ENABLED
Parameter Type: Configurable
OIM Menu Path(s): Additional Parameters (listed by parameter number)
When this parameter is set to ENABLED , POSITIVE CURRENT LIM (P.005) and NEGATIVE
CURRENT LIM (P.006) are restricted to positive values.
When this parameter is set to DISABLED , the range of NEGATIVE CURRENT LIM (P.006)
is restricted to negative values.
When you change this parameter value:
• Alarm A00052 occurs.
• The parameters NEG CURRENT LIM SEL (P.224) and POS CURRENT LIM SEL (P.223)
are automatically set to REGISTER .
•
NEGATIVE CURRENT LIM (P.006) is inverted. For example, if NEG CUR LIM INV EN is
set to ENABLE and NEGATIVE CURRENT LIM is set to 150% FLA , changing NEG CUR
LIM INV EN to DISABLED changes the value of NEGATIVE CURRENT LIM to –150% FLA .
Carefully check your current limit scheme and the values of POSITIVE CURRENT LIM
(P.005) and NEGATIVE CURRENT LIM (P.006) to avoid unintended drive operation.