User`s manual

DeviceNet (Master) Function
8-16
8
(8) Top address of the I/O table (when in the slave mode)
This system memory location is used to store the top address of the I/O table when the JW-32CUM1
is in the slave mode.
- When this bit is OFF (#363 = 00(HEX)), fixed allocation is enabled.
[Ex.] The top address of the input/output table is "ｺ2000."
- When this bit is ON (#363 = 80(HEX)), "free allocation" is enabled, and the file addresses specified in
system memory (locations #360 to #362) are the top address of each table.
(When "fixed allocation " is selected, these addresses are ignored.)
Note: When this bit is ON and the top address (specified in locations #360 to #362) is not specified
(left as 00(HEX)), the top address will be "ｺ0000." Be careful because this may duplicate an
address allocated to an I/O module on the same basic rack panel.
(9) Number of I/O bytes (when in the slave mode)
This system memory location is used to store the number of input bytes (0 to 127 bytes) and output
bytes (0 to 127) when the JW-32CUM1 is in the slave mode.
- The specified number of bytes are allocated from the top address in the I/O table (when used in the
slave mode) with input bytes being allocated first, followed by the area for the output bytes.
(10) Restore/clear the slave area when a communication error occurs (when used in the slave
mode)
When the JW-32CUM1 is in slave mode, this system memory location is used to set the JW-32CUM1
status when a communication error occurs (select whether to latch or clear the contents of the box
marked in gray in the figure below). - See page 8-50.
(11) Response time to the master station (when slave mode is selected)
When the JW-32CUM1 is in slave mode, this system memory location is used to specify a response
time (0 to 655528 ms) to the master station.
- Normally set to 0 ms.
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System memory Set details
#364 Number of input (sending) bytes: 0 to 127 bytes (0 to 177
(OCT))
#365 00
(HEX): Fixed
#366 Number of output (receiving) bytes: 0 to 127 bytes (0 to 177
(OCT))
#367 00
(HEX): Fixed
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System memory Set details
#371
Response time to the master station
- Specify 0 to 65528 ms (0 to 65528
(DCM))inunits of 8 ms.
- When set to 1 to 7 ms, it will be changed to 8 ms. Figures less a
value evenly divisible by 8 will be rounded off. (Ex.: When 15 ms is
specified, this value is rounded off to 8 ms.)
#372
Input data
Output data
Input data
Output data
Slave module
(JW-32CUM1)
Master module
Communication error occurs