Troubleshooting
Radio Troubleshooting
Radio Troubleshooting in industrial control systems — covering 5 topic areas in the CurryControls.com controls and automation knowledge hub.
Written guides in this section
Full references, procedures, and diagnostic guides published under Radio Troubleshooting.
Remote Site Stops Communicating
One radio site silent while its neighbors answer: site power, the radio, antenna and coax after a storm, a reset configuration, the controller behind it, or a changed path. What the master diagnostics say before anyone drives, and the order of checks on site.
8 min readUpdated Sep 5, 2026
Intermittent Radio Path
A site that drops and returns by the hour, season, or weather: thin fade margin, foliage, a new obstruction, a loosened antenna, coax taking water, a corroding connector, interference, or a marginal supply. How to trend signal against time and weather.
8 min readUpdated Sep 5, 2026
High Retry Count
Polls that succeed on the second or third try: a weak or noisy path, interference, collisions from a second master, a timeout shorter than the radio turnaround, a data rate the path cannot carry, or a slow controller. Reading retry statistics per site.
8 min readUpdated Sep 5, 2026
Poor Signal Margin
A path with too little signal above receiver threshold to survive rain, leaves, and inversions: the link budget from transmitter to receiver, the Fresnel zone, and why the margin is smaller than the study said. How to compute, measure, and add to it.
9 min readUpdated Sep 5, 2026
Interference on Channel
Data lost on a strong-signal path: another system on the frequency, a nearby transmitter overloading the receiver, intermodulation on a shared tower, drive noise, or a stuck transmitter. How to measure the noise floor, find the source, and cure it.
8 min readUpdated Sep 5, 2026
Topics in this area
Remote Site Stops Communicating
Remote Site Stops Communicating — practical reference notes for controls engineers, integrators, and technicians working with radio troubleshooting.
Intermittent Radio Path
Intermittent Radio Path — practical reference notes for controls engineers, integrators, and technicians working with radio troubleshooting.
High Retry Count
High Retry Count — practical reference notes for controls engineers, integrators, and technicians working with radio troubleshooting.
Poor Signal Margin
Poor Signal Margin — practical reference notes for controls engineers, integrators, and technicians working with radio troubleshooting.
Interference On Channel
Interference On Channel — practical reference notes for controls engineers, integrators, and technicians working with radio troubleshooting.
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