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Appendix A—Description of parameters
VARIABLE SPEED DRIVE SERIES III LIT-12012999—June 2018 www.johnsoncontrols.com
Code Modbus ID Parameter Application RO/RW
P2.2.19 194 Run Enable 1,2,3 RW
Use this parameter for setting external safety start input that is required along with start command
for frequency converter to turn on output. When using this command if the function is set for Normally
Open, the drive will see this as a open input and not allow the drive to run due to no Ready. The default
state being Normally Closed indicates that the drive is in a Ready condition and will accept the start
command. When assigned to one of the DIGIN or Time channels it requires the input to be high to
activate output. Can be set to DigiIN:X indicates on board terminal inputs, DigiIN:A:IOX:X indicates
optional board inputs in A slot, DigiIN:B:IOX:X indicates optional board inputs in B slot, or Timer Channel
X. RO X Function allows for having an input turn on without having to hard wire it to the physical
relay output.
Closed contact = Start of motor enabled
Open contact = Start of motor disabled
P2.2.20 205 Preset Speed B0 1,2,3 RW
Use this parameter selecting the of the digital input for an external speed setpoint desired. Validating
3 digital inputs will allow for 7 preset speeds to be obtained. When switching between inputs it will
follow the acceleration and deceleration time. When all the inputs are set to Normally Open none of
the preset speeds will be enabled and the output will follow the control place reference command. If
the function is set for Normally Closed the drive will follow the preset speed assigned to the inputs
enabled. When assigned to one of the DIGIN on the control board or an installed option card it is
looking for a high input to enable that preset. Can be set to DigiIN:X indicates on board terminal inputs,
DigiIN:A:IOX:X indicates optional board inputs in A slot, DigiIN:B:IOX:X indicates optional board inputs in
B slot, or Timer Channel X. RO X Function allows for having an input turn on without having to hard wire
it to the physical relay output.
P2.2.21 206 Preset Speed B1 1,2,3 RW
Use this parameter selecting the of the digital input for an external speed setpoint desired. Validating
3 digital inputs will allow for 7 preset speeds to be obtained. When switching between inputs it will
follow the acceleration and deceleration time. When all the inputs are set to Normally Open none of
the preset speeds will be enabled and the output will follow the control place reference command. If
the function is set for Normally Closed the drive will follow the preset speed assigned to the inputs
enabled. When assigned to one of the DIGIN on the control board or an installed option card it is
looking for a high input to enable that preset. Can be set to DigiIN:X indicates on board terminal inputs,
DigiIN:A:IOX:X indicates optional board inputs in A slot, DigiIN:B:IOX:X indicates optional board inputs in
B slot, or Timer Channel X. RO X Function allows for having an input turn on without having to hard wire
it to the physical relay output.
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