Pixsys PL260, Руководство пользователя

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23
SM n°
Mod.
word
Description / meaning
SM0 1000 Status bit
Bit 0 RUN/STOP bit (1=run). At starting this bit is
always forced to ON, obtaining the RUN mode
of PLC. In STOP mode, the relay outputs of
PLC are disabled. R/W
Bit 1 This bit is always ON for first scanning cycle
of main program. Eg. It is used to execute
initialization subprogram. R
Bit 2 This bit makes available a clock impulse of 60
seconds (ON for 30 seconds, OFF for 30
seconds). R
Bit 3 This bit makes available a clock impulse of 1
second (ON for 0,5 second, OFF for 0,5
second) R
Bit 4
This bit is a clock of scanning cycle, which is
active ON for one cycle and disabled OFF for
following cycle. It may be used as counting
input for scanning cycle. R
Bit 5 Bit TEST. Setting this bit as ON, the reading
of digital inputs is disabled. Status of inputs is
read on word SM37. Setting this word, it is
possible to execute debug/test of the program
simulating input starting. R/W
Bit 6 This bit is ON during the transmission of data
to serial port COM1. It is automatically set to
OFF at the end of transmission R
Bit 7 This bit is ON during the transmission of data
to serial port EXP1. It is automatically set to
OFF at the end of transmission. R
Bit 8 This bit is ON during the transmission of data
to serial port COM2. It is automatically set to
OFF at the end of transmission. R
Bit 9 If set to ON this bit enables mode “modem” for
serial port COM1. This means that Timeout
between one character and the other
character in receiving mode is automatically
set to 40mS. R/W