Specifications; Performance Specifications - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

3

SPECIFICATIONS

3 SPECIFICATIONS
This chapter explains the performance specifications and function specifications of the
network modules as well as the specifications of the send/receive processing time of
the link data.
For details of the general specifications, refer to the QCPU User's Manual (Hardware
Design, Maintenance and Inspection).

3.1 Performance Specifications

3.1.1 Performance specifications
The following table lists the performance specifications of the network modules.
(1) Performance specifications of the optical loop system
Item
LX/LY
Maximum number of
LB
link points per network
LW
Maximum number of link points per station *1
Communication speed
Number of stations per network
Connection cable
Applicable connector
Overall distance
During 25Mbps
Distance between
2
stations*
During 10Mbps
Maximum number of networks
Maximum number of groups
Transmission path format
Communication method
Synchronous method
Encoding method
Transmission format
Error control system
RAS function
Transient transmission
Special cyclic transmission function
Number of occupied I/O points
Voltage
Current
Size of terminal screw
External Power Suitable crimp terminal
Supply
Suitable cable size
Tightening torque
Allowable momentary
power failure time
3 - 1
QJ71LP21 QJ71LP21-25
16384 points (8192 points in the MELSECNET/10 mode)
16384 points (8192 points in the MELSECNET/10 mode)
• MELSECNET/H mode, MELSECNET/10 mode
{(LY + LB) / 8 + (2 {(LY + LB) / 8 + (2
LW)}  2000 bytes
• MELSECNET/H Extended mode
{(LY + LB) / 8 + (2
25 Mbps/10 Mbps
10 Mbps
(Change with mode setting switch)
Up to 64 stations (1 control station, 63 normal stations)
Two-core optical connector plug (obtained by user)
F06/F08 or equivalent (JIS C5975/5977 compliant)
SI optical cables: 200m
H-PCF optical cables: 400m
Broad-band H-PCF Optical Cables: 1km
QSI optical cables: 1km
SI optical cables: 500m
H-PCF optical cables: 1km
Broad-band H-PCF optical cables: 1km
QSI optical cables: 1km
239 (total including remote I/O networks)
NRZI code (Non Return to Zero Inverted)
Retries based on CRC (X
• Loopback function upon abnormal detection and cable breakage (optical loop system only)
• Diagnostic function of host link line check
• Prevention of system down by switching the control station
• Abnormal detection using link special relays and link special registers
• N:N communication (monitor, program upload/download, etc.)
• Various send/receive instructions from sequence programs (ZNRD/ZNWR, SEND/RECV, RECVS,
READ/WRITE, SREAD/SWRITE, REQ, RRUN/RSTOP, RTMRD/RTMWR.)
• Send function addressed to logical channel number of channel numbers 1 to 8
• Low-speed cyclic transmission function
32 points
(I/O assignment: intelli.; 32 points)
Optical loop system
QJ71LP21S-25 QJ71LP21G
8192 points
LW)}  2000 bytes
LW)}  35840 bytes
*2
Optical fiber cable (obtained by user)
30km
GI-50/125 optical
cables: 2km
32 (9 in the MELSECNET/10 mode)
Duplex loop
Token ring
Frame synchronous
Conforms to HDLC (frame type)
16 12 5
+ X + X + 1) and timeover
48 (I/O assignment:
Empty; first 16, intelli.;
(I/O assignment: intelli.; 32 points)
last 32)*3
20.4 to 31.2 V DC
0.20 A
M3 Screw
R1.25-3
2
0.3 to 1.25 mm
0.42 to 0.58 N·m
1ms (Level PS1)
MELSEC-Q
3
QJ71LP21GE
10 Mbps
GI-62.5/125 optical
cables: 2km
32 points
3 - 1