Toshiba nv Series Instruction Manual page 99

RAS information
(1) DN module status
(4 words)
(2) DN node active
(4 words)
(3) DN node idle
(4 words)
(4) DN node fault
(4 words)
(5) DN node status
(32 words)
(1) DN module status (DN_MDL_STS_**)
Offset Description
+0 Active Connections
+1 Device State
+2 Expected Packet Rate
+3 DIP setting (0 to 7 bit)
Scan flags (8 to 15 bit)
(1)-1 Active Connections
The high-order byte of the offset (+0) represents "the number of connections established with other DeviceNet
nodes in the network". The number of connections may be calculated as 2 for slaves that support both I / O
connections and Explicit connections. As a result, Active Connections may not match the actual number of
connections.
The actual number of connections can be calculated by finding the exclusive OR of "DN_NOD_ACT_**" and
"DN_NOD_FLT_**". However, it is necessary to take into consideration that 1 is set in the MAC ID of DN912
itself of "DN_NOD_FLT _ **" when there is no slave connected to DN912.
Table 6-3 RAS information that can be set with I/O variables
Unified Controller nv Series DeviceNet Module DN912 Instruction Manual
I/O variable name
DN_MDL_STS_**
DN_NOD_ACT_**
DN_NOD_IDLE_**
DN_NOD_FLT_**
DN_NOD_STS_**
Explanation
Upper byte : Number of connections established with
other DeviceNet nodes in the network. (refer (1)-1)
Bit-coded status information (refer (1)-2)
Expected packet rate for polled and bit-strobe I/O
connections
Reflects the value of the on-board switch
Bit-coded status information (refer (1)-3)
6.1 RAS
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