Mitsubishi Electronics MELSECNET/H Performance Specifications, ZDifferences from QJ71LP21-25

zDifferences from QJ71LP21-25

The QJ71LP21S-25 has the same function and performance as the QJ71LP21-25. Therefore, the program for the QJ71LP21-25 is available for the QJ71LP21S-25.

However, the QJ71LP21S-25 requires two I/O slots while the Q71LP21-25 requires only one I/O slot.

[Performance Specifications]

	Item			QJ71LP21S-25
Maximum number			LX/LY	8192 points
of link points per			LB	16384 points (In MELSECNET/10 mode: 8192 points)
network			LW	16384 points (In MELSECNET/10 mode: 8192 points)
Maximum number of		link points per		((LY + LB) /8 + (2 × LW) ≤ 2000 bytes
station
Communication speed				25 Mbps/10 Mbps (Selectable by mode switch)
Number of connectable stations per				64 stations (control station: 1, normal station: 63)
network
Connection cable				Optical fiber cable *1
Overall distance				30 km (98430 ft.)
				Sl optical cable:200 m (656.2 ft.)
			25Mbps	H-PCF optical cable :400m (1312.4 ft.)
				Broad-band H-PCF optical cable :1 km (3281 ft.)
Distance between
				QSl optical cable:1 km (3281 ft.)
stations				Sl optical cable: 500 m (1640.5 ft.)
			10Mbps	SI type H-PCF optical cable :1 km (3281 ft.)
				Broad-band H-PCF optical cable :1 km (3281 ft.)
				QSl optical cable:1 km (3281 ft.)
Maximum number of		networks		239 (Total including number of remote I/O networks)
Maximum number of groups				32 (In MELSECNET/10 mode: 9)
Transmission path format				Duplex loop
Communication method				Token ring
Synchronous method				Frame synchronous method
Encoding method				NRZI (Non Return to Zero Inverted) code
Transmission format				Conforms to HDLC (Frame type)
Error control system				Retries based on CRC (X16+X12+X5+1) and timeover
				y Loopback function due to error detection and cable breakage
RAS function				y Link line self-diagnostic function
				y Prevention of system failure by switching to alternative control station
				y Error detection using special relays and registers
				y N-to-N communication (monitoring, program up/downloading, etc.)
Transient transmission				y Various send/receive instructions from sequence programs
				(ZNRD/ZNWR,SEND/RECV,RECVS,READ/WRITE,SREAD/SWRITE,
				REQ,RRUN/RSTOP,RTMRD/RTMWR)
				y Send function by addressing to channel number of 1 to 8
Special cyclic transmission function				y Low-speed cyclic transmission function
No. of occupied I/O points				48 points (I/O assignment: first 16 points as empty, last 32 points as intelligent) *2
	Voltage			20.4 to 31.2 V DC
External	Current			0.20 A
	Terminal screw size			M3 screw
supply	Applicable solderless			R1. 25-3
power	terminal
	Applicable wire size			0.3 to 1.25 mm2
	Tightening torque			42 to 58Nycm
Internal current consumption (5 VDC)				0.55 A
Weight				0.20kg

*1: For conventional optical fiber cable (A-2P-), the distance between stations varies with the type L and H.

*2: Two I/O slots are occupied.

The head I/O address should be the number added on 10H to the head address of installed slot, because the first slot occupies 16 points as a vacant and the second slot occupies 32 points for the automatic I/O assignment. It is available to assign zero for the first slot.

(Example)

When installing the module to slot 0, set 10H to “Start I/O No.”

(When 0 point is set for slot 0 in the I/O assignment, set 0H to “Start I/O No.”)

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