IBM 4230 User Guide - Page 177

Format/Online Indicator (Model 5S3) The indicator functions as a Format indicator when the coaxial attachment is active (see the below operating conditions for the Format indicator) or as an Online indicator when the parallel or serial attachment is active (see the above operating conditions for the Online indicator). On The Cancel Print, PA1, and PA2 keys are available for use (that is, you can press them in the printer's current state). Off The PA1 and PA2 keys are not currently available. The Cancel Print key is only available when running an Operator Print Test. The PA1 and PA2 keys are used to send special operator requests. See "Understanding the Operator Panel" in the IBM 4230 Printer Models 101, 1S2, 201, 2S2, 4S3, and 5S3 Operator Panel Instructions for more information on these keys. Attention Indicator The Attention indicator has two operating conditions: Off The printer has not detected any conditions requiring operator intervention. Blinking The printer has detected a condition requiring immediate operator intervention. The alarm also beeps (if not disabled). If the printer also displays a status code, go to "Using the Status Code and Problem Listings" on page B-2. Chapter 3. Getting to Know Your Printer 3-13