User`s manual

BL160068 s Troubleshooting
Out of the Box
Check the items listed below before starting development. Rechecking
may help to solve problems found during development.
 Do not connect any boards with PLCBus, RS-485 or any other I/O
devices until you verify that the BL1600 runs standalone.
 Verify that the entire system has good, low-impedance, separate
grounds for analog and digital signals. The BL1600 is often connected
between the host PC and another device. Any differences in ground
potential can cause serious problems that are hard to diagnose.
 Double-check the connecting cables. It is possible to reverse the
connections to the BL1600 headers.
 Do not connect analog ground to digital ground anywhere.
 Verify that the host PCs COM port works by connecting a known-good
serial device to the COM port. Remember that a PCs COM1/COM3
and COM2/COM4 share interrupts. User shells and mouse software, in
particular, often interfere with proper COM-port operation. For
example, a mouse running on COM1 can preclude running Dynamic C
on COM3.
 Use the Z-World power supply supplied with the Developers Kit. If
another power supply must be used, verify that it has enough capacity
and filtering to support the BL1600.
 Use the supplied Z-World cables. The most common fault of home-
made cables is their failure to properly assert CTS at the RS-232 port
of the BL1600. Without CTS being asserted, the BL1600s RS-232
port will not transmit. You can assert CTS by either connecting the
RTS signal of the PCs COM port or looping back the BL1600s RTS.