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DM Area Allocations Section 4-3
address, even if a non-zero IP address was set in the IP Address Display/
Setting Area words beforehand.
(2) It is not possible to set the following IP addresses. If any of these values
are set, the ERH indicator will flash.
• IP addresses where all network number bits are 0 or 1.
• IP addresses where all host number bits are 0 or 1.
• IP addresses where all subnet number bits are 1.
• IP addresses that start with 127 (7F hexadecimal, e.g., 127.35.21.16).