Parker LVD1 - 4 Programming Digital Inputs and Outputs; The Pico-PLC

Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
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4 Programming digital inputs and outputs
4.1 The “pico-PLC”
The internal pico-PLC makes it possible to connect peripheral systems (inputs/outputs) to the
parametric system of the LVD drive. The PLC can be used to copy a digital input into a bit
parameter, copy a bit parameter into a digital output and perform mathematical and Boolean
calculations. The PLC program must be entered as a list of instructions from the keypad;
alternatively the PLC can be programmed with the ladder diagram system using a PC on the serial
line with an interface such as PC2LVD. Default parameterisation (b99.12) provides a PLC program
(see appendix F) designed to fill the requirements of the broadest possible range of applications,
therefore it is not necessary to reprogram the PLC in the majority of cases. Main features of the
pico-PLC are:
Program steps 128
scan time 6.144 ms
number of timers 2
number of instructions 15
stack depth 1
mathematical operations 16 / 32 bits
fast inputs 3 - (512 µs)
PLC PARAMETERS
Pr71 Constant value = -1. Double word.
Pr72 Constant value = 0. Double word.
Pr73 Constant value = 1. Double word.
Pr74 Constant value = 2. Double word.
Pr75 Constant value = 10. Double word.
Pr76 Constant value = 100. Double word.
Pr77 Constant value = 1000. Double word.
Pr78 Constant value = 1024. Double word.
Pr79 Constant value = 4096. Double word.
Pr80 Free parameter. Parameter with storage facility at user's disposal (word).
Pr81 Free parameter. Parameter with storage facility at user's disposal (word).
Pr82 Free parameter. Parameter with storage facility at user's disposal (word).
Pr83 Free parameter. Parameter with storage facility at user's disposal (word).
Pr84 Free parameter. Parameter with storage facility at user's disposal (word).
Pr85 Free parameter. Parameter with storage facility at user's disposal (word).
Pr86 Free parameter. Parameter with storage facility at user's disposal (word).
Pr87 Free parameter. Parameter with storage facility at user's disposal (word).
Pr88 Free parameter. Parameter with storage facility at user's disposal (word).
Pr89 Free parameter. Parameter with storage facility at user's disposal (word).
b90.X Status of digital input X. If X is greater than 7 it represents a memory storable bit at the
disposal of the user (b90.0 = drive enable).
b91.Y Status of digital output Y. If Y is greater than 7 it represents a bit at the disposal of the
user. Pb91 is not stored in the memory and it is always at zero when the drive is powered up.
Pr92 First PLC timer. Every 6.144 ms, if Pr92 is other than zero, the timer is decreased, if Pr92
is equal to zero, bit parameter b99.0 is set to 1.