Document 44ZRmLMK7vm5Yqgx5nYZnzG7R

Unkn wn From: Sent: To: Subject: U433451 Wednesday, November 13,1996 4:02 PM JVHANEY RE: R250A/B MODICON CODE CHANGES Attach1 .TXT Methanes R-250A/B trip logic modifications Jim, I will be adding the two R-250 permissives from the Mod5 to the existing R-250A and R-250B trip logic as well as the fifo messaging logic. The trip logic modifications will be done as follows: R-250A Network #108 Disable coil 01371 (R-250A Run coil) which will keep it energized when power flow is removed. Expand the rung and insert 10011 and 10036 N/O contacts (or'd). Verify power flow to coil 01371, enable coil 01371. R-250B Network #115 Disable coil 01392 (R-250B Run coil) which will keep it energized when power flow is removed. Expand the rung and insert 10011 and 10036 N/O contacts (or'd). Verify power flow to coil 01392, enable coil 01392. `Message logic will be added, which does not effect the trip logic. Page 1 DO A 025341 CONFIDENTIAL