User`s manual

PK2200

PLCBus s 101

Digital output devices, such as relay drivers, should be addressed with

three 4-bit addresses followed by a 4-bit data write to the control register.

The control registers are configured as follows

bit 3 bit 2 bit 1 bit 0

A2 A1 A0 D

The three address lines determine which output bit is to be written. The

output is set as either 1 or 0, according to D. If the device exists on the

bus, reading the register drives bit 0 low. Otherwise bit 0 is a 1.

For digital input, each register (BUSRD0) returns four bits. The read

8-Bit Devices

Z-Worlds XP8700 and XP8800 expansion boards use 8-bit addressing.

Refer to the XP8700 and XP8800 manual.

Expansion Bus Software

The expansion bus provides a convenient way to interface Z-Worlds

controllers with expansion boards or other specially designed boards.

The expansion bus may be accessed by using input functions. Follow the

suggested protocol. The software drivers are easier to use, but are less

efficient in some cases. Table E-5 lists the libraries.

Table E-5. Dynamic C PLCBus Libraries

Library Needed Controller

DRIVERS.LIB All controllers

EZIOTGPL.LIB BL1000

EZIOLGPL.LIB BL1100

EZIOMGPL.LIB BL1400, BL1500

EZIOPLC.LIB BL1200, BL1600, PK2100, PK2200, ZB4100

EZIOPLC2.LIB BL1700, PK2600

PBUS_TG.LIB BL1000

PBUS_LG.LIB BL1100, BL1300

PLC_EXP.LIB BL1200, BL1600, PK2100, PK2200