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5 Message Communications
CompoNet Communications Unit User’s Manual (I582-E1)
5-
4 Paramet
er Read
/W
rite
(Class
64
hex)
5
5-
4-3 Par
ameter R
ead/W
rite
Data
Precautions for Correct Use
Precautions for Correct Use
If single-word (16-bit) or double-word (32-bit) data is sent/received in an Explicit Message, the
order of high and low bytes will be reversed due to the following reason. Therefore, in the
Parameter Read/Write data, the Attribute value is located in high byte and the low byte of data
is located in low byte. The high byte of data is located in high byte of the next word.
• Data on communications lines: Sent/received in order of low byte to high byte.
• Data processed in PLC when issuing a command etc.: Sent/received in order of high byte to
low byte.
The Parameter Read/Write data is calculated according to the rules below and sent/received as a hexa-
decimal value.
• The set value is divided by the data resolution and converted into a hexadecimal value.
Precautions for Correct Use
Precautions for Correct Use
The data resolution indicates the minimum setting unit for each Modbus register.
Example: If the output frequency setting is 60 Hz and the data resolution is 0.01 Hz
60 / 0.01 = 6000
→
1770 hex
• Any negative value is represented as a 2's complement number.
Example: If the Torque Bias Value (P037) is set to -100% and the data resolution is 0.01 Hz (for
3G3MX2)
100 / 1 = 100 dec
→
0064 hex, -100%
→
FF9C hex
• If the set data is already represented in a hexadecimal form, the data will be sent without converting.
• Each unused bits must be set to 0.
• Do not set data in any unused register.
5-4-3
Parameter Read/Write Data
0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0
1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 1
1 1 1 1 1 1 1 1 1 0 0 1 1 1 0 0
bit reversed
+ 1
= FF9C hex
= FF9B hex
0064 hex =
Содержание 3G3AX-MX2-CRT-E
Страница 58: ...2 CompoNet Communications Unit Mounting and Wiring 2 16 CompoNet Communications Unit User s Manual I582 E1...
Страница 94: ...3 Network Startup 3 36 CompoNet Communications Unit User s Manual I582 E1...
Страница 118: ...4 Remote I O 4 24 CompoNet Communications Unit User s Manual I582 E1...
Страница 134: ...5 Message Communications 5 16 CompoNet Communications Unit User s Manual I582 E1...
Страница 167: ...I 1 I CompoNet Communications Unit User s Manual I582 E1 Index...
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