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4.6.3 Parameter Setting Request (local node)
(1) The Function
This request is used for setting the "local node parameters" of the DN211. This request can be
issued only when the DN211 is in standby mode.
After setting the "local node parameters" and "slave device parameters," set the DN211 to "run
mode (transmission-enabled)" by following "4.6.5 Operation Mode Control Request." If the slave
device parameters have already been set into the non-volatile storage of the DN211, set the
DN211 to run mode by following "4.6.5 Operation Mode Control Request" after setting "local node
parameters."
(2) Data Part Format
a) Request
Request area
0334H Request code (0012H)
0335H Request type = 0
0336H Port No. = 0
0337H Local station node address Setting value : 0 to 63
0338H Polling transmission mode Setting value: 0, 1
0339H Scan interval wait time Setting value: 2 to 10,000 ms
033AH Background poll ratio Setting value: 1 to 65535
033BH Retransmission counter Setting value: fixed at 1
033CH Transmission timing Setting value: in ms
b) Acknowledgement
Acknowledgement area
02D0H Request code (0012H)
02D1H Completion status
See "4.7 Completion Status" for the above completion status.
c) Local Station Parameters
Table 4.13 Local Station Parameters (1/2)
Parameter Description
Polling transmitting mode 0: Makes a polling request to all slave devices and waits for the polling
response in batch.
1: Waits for polling response after requesting polling by the slave device.
Scan interval wait time Specifies the wait time until starting the next access after completing
access to all slave devices.
Minimum value: 2 ms Maximum value: 10,000 ms
Background poll ratio Accesses the devices to which background polling was specified
(setting with slave parameters) at scan interval set to the poll ratio.
Example) When 5 is specified, access is made by 5 scans.
This parameter is effective both for polling mode devices 1 bit strobe
mode devices.
Retransmission counter Fixed at "1"