The Siemens Simatic S7-1500 Technology CPUs 1516T(F), 1517T(F) and 1518T(F) have been upgraded. The display is now integrated into the CPU and the run/stop switch is replaced by two push buttons. System diagnostics are also now integrated into the controllers, which can be used for safety-related tasks per IEC 61508 up to SIL 3 and ISO 13849-1 up to PLe. The performance, program and data memory of the CPUs have also been significantly increased, resulting in higher data throughput and greater determinism of the user program — up to 200% for OPC UA and web API (read/write). Program memory is now: CPU 1516T/TF: 3 MB, CPU 1517T/TF: 6 MB and CPU 1518T/TF: 18 MB. Upgraded data memory is now: CPU 1516T/TF: 25 MB, CPU 1517T/TF: 50 MB and CPU 1518T/TF: 150 MB.
