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10 Modbus RTU MN744

Table 6 Control Modes Description Continued

Control Mode Action Control Sources/Commands

PROCESS VELOCITY MODE

Process velocity control is

similar to PROCESS

operating mode. Closes the

process velocity loop with set

point input from the source

selected in the “SETPOINT

COMMAND” parameter

(P2604), feedback input from

the source selected in the

“PROC FEEDBACK “

parameter (P2603), and

feedforward input from the

source selected in the “PROC

FEEDFORWARD” parameter

(P2602).

Writing `1' to this coil will latch

(set) the `PROCESS

VELOCITY MODE' coil and

will clear all other control

mode coils.

NOTE: Applicable in

Inverter/Vector/Servo product

variants.

Writing'0' to this coil will clear

the “PROCESS VELOCITY

MODE” coil if it's already SET

or else it will be ignored.

Control Source.2 NETWORK: when set to `1' replaces the command source selection to

“NETWORK”. Same as setting P1402 to “NETWORK”.

Control Source.9: ACC/DEC Group 1. Selects the accel/decel group 1 for ramp generation.

Control Source.10: ACC/DEC Group 2. Selects the accel/decel group 2 for ramp generation.

Control Command.13: STOP COMMAND. Writing `1' will issue stop command (sets the

internal speed reference to zero) to the drive. Will hold zero speed unless J2-8, J2-9

or J2-10 is open.

Control Command.17: DRIVE ENABLE. Writing `1' will enable the drive provided J2-8 is

closed. Writing `0' will issue a disable command to the drive and PWM's will be turned

off and all other control commands will be ignored till this coil is set again.

Control Command.14: FORWARD COMMAND. Writing `1' will enable the forward motion

provided J2-8 and J2-9 are closed. Writing `0'will issue a STOP command to the drive.

Control Command.15: REVERSE COMMAND. Writing `1' will enable the reverse motion

provided J2-8 and J2-10 are closed. Writing `0'will issue a STOP command to the drive.

Control Command.16: BIPOLAR COMMAND. Writing `1' will enable the forward/reverse

motion provided J2-8, J2-9 and J2-10 are closed. Writing `0'will issue a STOP

command to the drive. Actual direction of motion will depend on the polarity of torque

command. Useful while implementing 3-wire modes.

SETPOINT SOURCE: P2604. Determines the source of torque reference. It could be set

of any of the 8 selections except “NONE” or “KEYPAD”. If command source is set to

“NETWORK” then “PROCESS REFERENCE” holding register (Modbus Reference

40019/20) will become the process speed reference source.

PROC FEEDBACK SOURCE: P2603. Determines the source of process feedback. It could

be set of any of the 8 selections except “NONE” or “KEYPAD”. If process feedback

source is set to “NETWORK” then “PROCESS FEEDBACK” holding register (Modbus

Reference 40021/22) will become the process feedback source.

PROC FEEDFORWARD SOURCE: P2602. Determines the source of process feedforward.

It could be set of any of the 8 selections except “NONE” or “KEYPAD”. If process

feedforward source is set to “NETWORK” then “PROCESS FEEDFORWARD” holding

NETWORK MODE

CURRENT LIMITING

Sets the current limit while in

speed control mode.

Speed control mode is similar

to BIPOLAR operating mode.

Closes the speed loop with

command input from the

source selected in the

“Command Source”

parameter (P1402).

”CURRENT LIMIT” parameter

(P1414) should be set `ON' or

else this control mode will be

ignored.

”CURR LMT SOURCE”

parameter (P1415) should be

set to “NETWORK”.

Writing `1' to this coil will latch

(set) the “NETWORK MODE

CURRENT LIMITING” coil

and will clear all other control

mode coils.

NOTE: Applicable in

Vector/Servo product variants.

Writing'0' to this coil will clear

the “NETWORK MODE

CURRENT LIMITING” coil if

it's already SET or else it will

be ignored.

Control Source.2 NETWORK: when set to `1' replaces the command source selection to

“NETWORK”. Same as setting P1402 to “NETWORK”.

Control Source.9: ACC/DEC Group 1. Selects the accel/decel group 1 for ramp generation.

Control Source.10: ACC/DEC Group 2. Selects the accel/decel group 2 for ramp

generation.