关于TPS系统串口卡的问题。 点击：542 | 回复：11
发表于：2008-05-08 08:08:56
5楼
关于串口卡的说明太简单了，还没有例子。如果有浮点数的读写，那是相当地麻烦，楼上的如果工程做完了请写一些经验总结出来，大家一起参考，关于串口卡的应用我现在只会从下位机读，可是怎么也写不下去 !我的邮箱：nmjwp1998_2002@sina.com.cn,多联系!
发表于：2008-05-08 15:22:40
8楼
Note that—
• APM/HPM numeric data mapped to an integer register in a Modbus device is 截断
to whole numbers.
• Floating point format data for the address range 20001 to 29999 is returned in standard
IEEE floating point format except that the low and high words are swapped. This
format is appropriate for the Modicon 984 Programmable Logic
Controller (PLC).
• Floating point format data for the address range 70001 to 79999 is returned in standard
IEEE floating point format. This format is appropriate for the Triconex Critical
Process Controller.
• Floating point format data for the address range 80002 to 89999 is returned in standard
IEEE address - 1 floating point format. This format is appropriate for the
Honeywell 620 LCS.
For Modbus compatible devices other than those listed above, floating point formats may
vary. Honeywell’s multivendor interface certification program determines which format (if
any) is appropriate. Contact your Honeywell representative for further information.
• APM/HPM numeric data mapped to an integer register in a Modbus device is 截断
to whole numbers.
• Floating point format data for the address range 20001 to 29999 is returned in standard
IEEE floating point format except that the low and high words are swapped. This
format is appropriate for the Modicon 984 Programmable Logic
Controller (PLC).
• Floating point format data for the address range 70001 to 79999 is returned in standard
IEEE floating point format. This format is appropriate for the Triconex Critical
Process Controller.
• Floating point format data for the address range 80002 to 89999 is returned in standard
IEEE address - 1 floating point format. This format is appropriate for the
Honeywell 620 LCS.
For Modbus compatible devices other than those listed above, floating point formats may
vary. Honeywell’s multivendor interface certification program determines which format (if
any) is appropriate. Contact your Honeywell representative for further information.
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