SMB5 I/O Status Bits

Special Memory Byte 5 (SM5.0 - SM5.7) contains status bits about error conditions that were detected in the I/O system. These bits provide an overview of the I/O errors detected.

SM Bits
(Read Only)

Description

SM5.0 This bit is turned on if any I/O errors are present.
SM5.1 This bit is turned on if too many digital I/O points have been connected to the I/O bus.
SM5.2 This bit is turned on if too many analog I/O points have been connected to the I/O bus.
SM5.3 This bit is turned on if too many intelligent I/O modules have been connected to the I/O bus.
SM5.4 Reserved
SM5.5 Reserved
SM5.6 Reserved
SM5.7 This bit is turned on if a DP standard bus fault is present.