821
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Basic I/O Unit Instructions
3
MTR
Precaution
• Do not read or write the system word (C) from any other instruction. MTR(213) will not operate
correctly if the system word is accessed by another instruction. The system word is not initialized by
MTR(213) in the first cycle when program execution starts. If MTR(213) is being used from the first
cycle, clear the system word from the program.
• I/O refreshing must be performed with the I/O Unit connected to the external matrix after each
MTR(213) instruction is executed. If the cycle time is short, operation may not be correct depending
on the ON/OFF response time of the I/O Unit. If necessary, use an I/O Unit with a short ON/OFF
response time or use the minimum cycle time function to adjust the cycle time. Do not connect the
external matrix to the following Units.
• Basic I/O Units or High-density I/O Units mounted in a SYSMAC BUS Remote I/O Slave Rack
• Communications Slaves (DeviceNet or CompoBus/S Slaves)
• When executed, MTR(213) begins reading the matrix status from the beginning of the matrix,
regardless of the point at which the last instruction was stopped.
• There is no restriction on the number of times that MTR(213) can appear in the program (unlike the
C200HX/HG/HE and CQM1H Series).
Example Programming
In this example, MTR(213) reads the 64 bits of data from the 8 × 8 matrix and stores the data in W0 to
W3. The 8 × 8 matrix is connected through CIO 100 (allocated to a CS1W-ID211 16-point DC Input
Unit) and CIO 200 (allocated to a CS1W-OD211 16-point Transistor Output Unit). D32000 is used as
the system word.
I
O
D
C
MTR(213)
100
200
W0.00
D32000
P_On
Always ON Flag
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