9 Application Instructions API 150-199 2. Special register explanations: D1336, D1337: Pulse present value register of CH0 (Y0) (D1337 high word, D1336 low word) D1338, D1339: Pulse present value register of CH1 (Y2) (D1339 high word, D1338 low word) D1375, D1376: Pulse present value register of CH2 (Y4) (D1376 high word, D1375 low word) D1377, D1378: Pulse present value register of CH3 (Y6) (D1378 high word, D1377 low word) DVP-PLC Application Manual 9-130