ZWorld Exp-A/D12, User Manual

Page: 36 / 111

XP8500 36 s Software Reference
Initialization Software
These Dynamic C functions are used to initialize the PLCBus. Call these
functions before using other expansion board functions.
• VdInit()
Initializes the timer mechanism.
LIBRARY:
VDRIVER.LIB
• void eioResetPlcBus()
Resets all expansion boards connected to the PLCBus.
When using this function, initialize timers with
VdInit()
before
resetting the PLCBus. All PLCBus devices must reset before perform-
ing any subsequent operations.
LIBRARY:
EZIOPLC.LIB
• void eioPlcRstWait()
Provides a delay long enough for the PLCBus to reset.
This function provides a delay of 1–2 seconds to ensure devices on the
PLCBus reset. This function should be called after resetting the
PLCBus.
LIBRARY:
EZIOPBDV.LIB
• long int eioErrorCode
The global variable lso needs to be defined.
eioErrorCode
repre-
sents a global bit-mapped variable whose flags reflect error occur-
rences.
This register for this variable is initially set to 0. If the application
tries to access an invalid channel, the flag
EIO_NODEV
(the first bit
flag) is set in this register. The other bits in
EIO_NODEV
deal with
networked controllers.