We have an application for some voltage signals to be connected to the MC3 application. We have selected an XC23 module which compares a VIN signal on the MC3 with a VIN on the XC23. We have two of these functions (1 x MC3 VIN and 1 x XC23 VIN = one of two comparison functions in the application) measuring two different positions using sensors.

We have found that one set (an MC3 and XC23 VIN comparison) seem to follow almost exactly, however the other pair, the XC23 signal appears to increase and decrease in approx. 20mV steps. We are using VIN E and F on the XC23 and it appears the VIN F is causing the stepped signal even though it looks like it should have an accuracy of 1.22mV.

We have changed the sensor and XC23 module, but still appears to be doing it. Is there any reason for this behaviour? I have checked the VREF in the application, and all the VINs are configured to the correct reference voltage.

IQAN 4.05, application cycle of 50ms.

The updated version of the IQAN-XC10 with support for DOUT diagnostics has been released.

DOUT-A to DOUT-P

These high-side DOUT:s can be configured to detect open load when the outputs are off. The detection is based on a shared "strobe" function, giving out a limited current at regular intervals. The detection is suited for loads such as solenoids, but should be kept disabled if any of the high-side DOUT:s are driving smaller load, e.g. LED lamps that will blink when this feature is used.

DOUT-Q to DOUT-T

These low-side DOUT:s can be configured to detect open load when the outputs are on. This diagnostic feature is based on undercurrent detection. The detection is suited for solenoid valves, but should be kept disabled if the DOUT is driving smaller loads, e.g. most relay coils.

PWMOUT

The PWMOUT has open load detection based on measuring undercurrent also in previous versions. Now the option to disable undercurrent detection is available.

For more details on the DOUT/PWMOUT diagnostic features, see IQAN-XC10 instruction book, Appendix A.

http://www.parker.com/literature/Electronic%20Controls%20Division/Literature%20files/iqan-xc10_uk_instructionbook.pdf

IQANdesign support

The features are available with IQANdesign 3.15 and higher

IQAN-XC10 firmware version and serial number

The IQAN-XC10 modules have a new serial number range:

S/N: 161726-000005 and higher

We are looking at energising automotive relays using the outputs on either the XC21, 22 or 23. Do we have to use relays that have diode suppression in parallel to reduce the risk of shortening the life of the output?