Pixsys EPL101, Руководство пользователя

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fixed value and for output 100% the PID output will be equals to maximum
fixed value. For each PID [1..8], minimum and maximum values of output
are initialized at starting as 0 and 10000.
2.2.17 Contact NOT
Contact NOT modifies the state of current flow. Current flow stops if it
reaches contact NOT and it works if it does not reach contact NOT. The
operation NOT modifies logic value from 0 to 1 or from 1 to 0.
2.2.18 Contact P and N
The contact “positive transition P” activates the current flow for a scanning
cycle at each transition Off / On. The contact “negative transition N”
activates the current flow for a scanning cycle at each transition On / Off.
When the operation “positive transition P” detects a transition of logic value
from 0 to 1, it sets this value to 1, otherwise to 0. When the operation
“negative transition N” detects a transition of logic value from 1 to 0, it sets
this value to 1 , otherwise to 0.
2.2.19 Function SEND and Free-port mode
Function SEND allows to activate data transmission by means of serial
ports in mode free-port. In this mode, which can be activated by special
marker SM32, SM33 and SM34, the protocol which usually handles the
serial ports is desabled and the ports as well as the relevant TXT and RX
buffers are controlled by the ladder program. After loading on buffer the
data to send and activating function SEND (which uses serial port and no.
of characters to send as parameters) these data will be sent on serial line.
During the transmission of data, bit SM0.7, SM0.7 or SM0.8 (according to
transmission port) will be set to “1”, while it will be set to “0” at the end of
transmission. It is possible to check the answer of a connected device by
means of SM35, SM36 and SM37, which contain the number of characters
received and saved on RX buffer of each serial port. Any writing on each of
these special marker will empty the RX buffer. Calls to function SEND
before the end of previous transmission or with mode free-port desabled
will be ignored by the program.
2.2.21 Serial communication function COM
Communication functions COM enables the programming of the serial ports
(COM1-RS485) for reading/writing of data from connected slave devices
using the master protocol selected in the project. These functions are
active only when in the project a master communication protocol has been