Troubleshooting the TX-I/O Island Bus
Troubleshooting the TX-I/O Island Bus
All points on the TX-I/O island bus are failed.
Verify all three signals, System Neutral ( ), Communication Data (CD), and
Communication Supply (CS) are connected throughout the entire TX-I/O island
bus.
The 24 Vac LED on the TX-I/O Power Supply is OFF.
1.
Check for 24 Vac input.
2.
Replace the fuse (4A, 5 × 20 mm, 250V, medium-acting, ceramic fuse).
The I/O Module Status LED (under the address key) is flashing or the I/O point
Status LED is flashing on an open point. All points are operating normally.
Reposition the TX-I/O Power Supply or Bus Connection Module so that the TX-I/O
Island Bus extends from the male bus connector.
The TX-I/O Power Supply and Bus Connection Module only supply 24 Vac to
TX-I/O Modules on the male bus connector.
TX-I/O Modules on the female bus connector of the TX-I/O Power Supply or
Bus Connection Module do not receive power and have a fault condition.
A point is failed or the point type displayed does not correspond to the point type
defined in the database.
1.
Using the job drawing or TX-I/O Island Bus layout sheet, verify that the address
keys are in the correct module.
2.
Reset the module to factory settings.
Verify that the module is supplied with 24 Vdc.
Remove keys that are in the wrong module.
Insert and then remove the reset key.
Cycle power to the module.
Insert the correct address key.
A current point on a Super Universal Module is failed.
Verify that the sensor supply wire is connected to the DC terminal (3, 11, 20, or
28).
Modules begin oscillating; island bus communication shuts down
Reset: Switch off the 24 Vac supply of the TC Modular or TC-36.
Relays and current outputs have a power consumption that depends on the supply
voltage (module supply 24 Vdc). The power consumption of an I/O island will rise when
all relays are active and all current outputs deliver 20 mA. This causes a drop in the
supply voltage.
48
Siemens Industry, Inc.
TALON TX-I/O Modules and Island Bus Technical Reference
588-587
CONFIDENTIAL: For internal use only
4/6/2010