Chapter 16 XG-SIM
16-28
16.3 Restrictions
Comparing to actual PLC, XG-SIM have the following restrictions.
16.3.1 Watchdog Timer
Watchdog timer is installed in XGI PLC to prevent a created PLC program from working abnormally. On the other hand, XG-SIM
executes scan at lower speed than actual XGI series PLC, so the watchdog timer set in the basic parameter does not work properly.
16.3.2 Communication module
XG-SIM does not provide any COM functions. Therefore, the following function blocks created by a program are saved as the internal
data of XG-SIM and they are not actually used for communication.
Class Name Function
Station No. setting P2PSN Designate the station no. of communication counterpart
Reading area designation(BOOL) P2PRD_BOOL Designate the bit data reading area
Reading area designation(BYTE) P2PRD_BYTE Designate the byte data reading area
Reading area designation (WORD) P2PRD_WORD Designate the word data reading area
Reading area designation (DWORD) P2PRD_DWORD Designate the double word reading area
Reading area designation (LWORD) P2PRD_LWORD Designate the long word data reading area
Writing area designation (BOOL) P2PWR_BOOL Designate the bit data writing area
Writing area designation (BYTE) P2PWR_BYTE Designate the byte data writing area
Writing area designation (WORD) P2PWR_WORD Designate the word data writing area
Writing area designation (DWORD) P2PWR_DWORD Designate the double word data writing area
Writing area designation (LWORD) P2PWR_LWORD Designate the long word data writing area
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