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APPX
Appendix 3 Buffer Memory
Receive buffer status storage area
■State of receive buffer (Un\G1900030)
Predefined protocol support function check area
■Predefined protocol ready (Un\G1901002)
Predefined protocol setting data check area
■Predefined protocol setting data error information (Un\G1901020 to Un\G1901023)
*1 The setting value may be unidentifiable (65535) in the following cases.
When a setting that cannot be detected by the current Ethernet-equipped module version is written in
When protocol setting data is broken (hardware failure)
■Number of registered predefined protocols (Un\G1901024)
Address Description
Un\G1900030 Stores the receive buffer status.
0: Receive buffer not full
1: Receive buffer full
Address Description
Un\G1901002 Stores the ready status of the protocol setting data.
0:
1: Ready
Address Name Description
Un\G1901020 Protocol number When a protocol setting data error is detected, stores the
protocol number where the error was detected.
Protocol is checked in order from smallest protocol number.
The protocol number where an error was detected first is
stored.
0: No error
1 to 128: Protocol number
65535: Cannot identify
*1
Un\G1901021 Setting type 0 is stored if an error is detected in the packet setting or
element setting.
1 is stored if an error is detected in the protocol detailed
setting. (Valid when protocol number value is 1 to 128)
0: Packet setting or element setting
1: Protocol preferences
65535: Cannot identify
*1
Un\G1901022 Packet number When an error is detected in the protocol setting data,
stores the packet number that detected the error.
The packets are checked in order of send packets and then
receive packets (expected packets) from smallest number.
The packet number where an error was detected first is
stored. (Valid when setting type value is 0)
0: Send packet
1 to 16: Receive packet number
65535: Cannot identify
*1
Un\G1901023 Element number When an error is detected in the protocol setting data,
stores the element number where the error was detected.
The elements are checked in order of smallest element
number. The element number where an error was detected
first is stored. (Valid when setting type value is 0)
1 to 32: Element number
65535: Cannot identify
*1
Address Description
Un\G1901024 Stores the protocol number of the registered protocol setting data.
0 is stored if the protocol setting data check result is abnormal.
0: No registration
1 to 128: Number of registrations
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