LS Industrial Systems GLOFA G7M-DR20U - Page 116

Chapter 7. Usage of Various Functions
7-9
(d) 2-phase multiplication mode (MUL4)
- Up or Down is set automatically by the phase difference between A and B phase.
• Up counter
- At the rising edge of A-Phase pulse when B-phase is ‘low’.
- At the falling edge of A-Phase pulse when B-phase is ‘high’.
- At the rising edge of B-Phase pulse when A-phase is ‘high’.
- At the falling edge of B-Phase pulse when A-phase is ‘low’.
• Down counter
- At the rising edge of A-Phase pulse when B-phase is ‘high’.
- At the falling edge of A-Phase pulse when B-phase is ‘low’.
- At the rising edge of B-Phase pulse when A-phase is ‘low’.
- At the falling edge of B-Phase pulse when A-phase is ‘high’.
(3) Preset setting
(a) Internal Preset
- Set internal preset area and preset value.
- Current value of high speed counter is replaced with preset value at the rising edge of internal preset device.
(b) External Preset
- Set external preset area and preset value.
- External devices are fixed as following
Ch0: IX0.0.4, Ch1: IX0.0.5, Ch2: IX0.0.6, Ch3: IX0.0.7
- Current value of high speed counter is replaced with preset value at the rising edge of external preset device.
B-
p
hase in
p
ut
p
ulse
Current value
A
-
p
hase in
p
ut
p
ulse
10 11 12 13
14 15 16 17 18 17 16 15 14 13