Omron CS1W-CRM21 - Cable Types, Maximum Distances, and Number of Slave Units

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CompoNet Network Specifications Section 1-2
1-2-1 Cable Types, Maximum Distances, and Number of Slave Units
This section provides specifications on the maximum cable length and the
maximum number of connectable Slave Units for each type of cable. The
cables and Units must be used within the specifications.
■ Baud Rate of 4 Mbps (No branching allowed. See note.)
Note Bit Slave Units come with Flat Cables and cannot be connected. The network
must consist of only Word Slave Units (use DCN4-MD4 Multidrop Connectors
for the Flat Cable I or Flat Cable II cables) and multidrop connections must be
used.
Slave Unit
status
Without Registration Table Participation Flag and Communications Error Flag for each Slave Unit
• Participation Flag: Turns ON and remains ON if the Slave Unit joins the net-
work even one time after system power is turned ON.
• Communications Error Flag: Turns ON if the Slave Unit cannot communicate
with the Master Unit for any reason after the Slave Unit has joined the network
(i.e., if the Participation Flag is ON). (Turns OFF when the error is removed.)
Duplicated Address Error Flags and Alarm Flags
With Registration Table • Participation Flags and Communications Error Flags for each node address
for all Slave Units registered in the Registration Table
• Registration Table Verification Error Flags
• All Registered Slave Units Participating Flag
Note The Registered Slave Unit Participation Monitoring Time can be set (ver-
ification error check timing).
Registered Slave Unit Participation Standby Mode can be set. (Remote
I/O communications will not start until all registered Slave Units are par-
ticipating.)
Item Specifications
Item Round Cable I or II Flat Cable I or II
Length per trunk line or sub-trunk line (maximum
length with two Repeater Units)
30 m (90 m) 30 m (90 m)
Branch line length Lines cannot be branched from the trunk line. (Only multidrop con-
nections are possible from the trunk line or subtrunk lines.)
Total branch line length
Restrictions on branch line locations
Number of Slave Units (including Repeater Units)
per trunk line or sub-trunk line
32 32
Master Unit
Trunk line
Branch line
Repeater Unit
Slave Units
Terminating Resistor
Trunk line length
Branch line length
Sub-branch
line
Sub-trunk
line len
g
th
Repeater
Unit
Repeater
Unit
Repeater
Unit
Branch line
Branch
line
Branch
lines
Branch
line
Branch
line
Slave
Unit
Repeater Unit
Repeater Unit
Slave Units
Branch
line length
Branch
lines
Sub-branch
line length
: Slave Unit
: T-branch
: Multi-drop
: Terminating Resistor
Sub-trunk
line length
Sub-
trunk
line
length
Sub-
trunk
line
length
Sub-trunk
line length
Sub-trunk
line length
Sub-trunk
line length