CPU就允许进行嵌套调用。如果没有足够的站空间支持程序块调用，会产生一个”堆栈溢出”故障。这种情况下，CPU不能执行这个程序块。CPU会将这个模块的所有二进制输出设为FAL SE,并且继续执行程序块调用指令之后的程序。
Allen Bradley 1336-B005-EAD-FA2-L3 AC Drive #10848
Barber Colman 80EB-10003-002-V-00 Maco 8000 #7915
Barber Colman Maco 4000 41AE-25103-218-1-00 #20654
Siemens Circuit Breaker JXD63B400 #12499
Fanuc A16B-1211-0062/10R Circuit Board #7229
Barber Colman 80CA-40001-002-0-00 MACO 8000 #7372
McLean Midwest Air Conditioner 13-0116-G1003E #29249
ABB Ethernet Communication 3HNE00001 DSQC336 #29412
Moog Servo Motor Controller 152J453A Brushless #14698
ABB Servo Control Card YYT102B YT212001-AD/7 #10939
Barber Colman Operator Interface 41AE-25103-218-1-00 #2
Allen Bradley 1305-BA06A AC Drive Series C #28890
Allen Bradley AC Servo Motor 1326AB-B430E-M #31768
Rexroth R978918472 Injection Control PC Board #18778
Barber Colman 80CC-11001-102-V-00 MACO 8000 #24841
Barber Colman 80EB-10004-001-V-00 Maco 8000 #15845
Mitsubishi Motion Controller A171SC PU-S3 #30895
Incoe Hot Runner Controller Case 3214-BRA #22415
Barber Colman Heat/Cool Module 80GA-10103-001-V-00 #328
DVT Controller for Camera 800-25M-DC-512K #21307
