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MELSEC-Q
6 PROGRAMMING
6.5 For Use in Remote I/O Network (Q62AD-DGH)
System configuration used in the program explanation
(1) System configuration
(2) Program conditions
In this program, the digital output values that have been A/D converted using
CH1 and CH2 of the Q62AD-DGH are read by the CPU of the remote master
station.
CH1 performs sampling processing, and CH2 performs averaging processing
every 50 times. An error code appears in BCD if a write error occurs.
(a) Initial settings
• A/D conversion enable channel ............. CH1, CH2
• Count-based
averaging processing channel .............. Average count setting of
CH2: 50 times
• Process alarm channel .......................... Lower lower limit value setting of
CH2: 1000
Lower upper limit value setting
: 1500
Upper lower limit value setting
: 6000
Upper upper limit value setting
: 7000
• Input signal error detection channel ...... Setting of CH1: 10%
(b) Devices used by the user
• Initial setting request signal ..................................... X20
• Digital output value read command input signal ..... X21
• Input signal error detection reset signal .................. X22
• Error reset signal ...................................................... X23
• Error code display (BCD 3 digits) ............................ Y30 to Y3B
• A/D conversion completed flag ................................ D10
• CH1 digital output value ........................................... D1, D2 (W1, W2)
• CH2 digital output value ........................................... D3, D4 (W3, W4)
• Warning output flag .................................................. D5 (W5)
Process alarm ........................................................... b2, b3 of D5 (M12, M13)
• Input signal error detection flag ............................... D6, M30 (W6, M30)
• Error code ................................................................. D7 (W7)
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