Manual

106

PfofiBus Gateway

8. Supported S7 Function Blocks/Functions

The function blocks (FB)/functions (FC) provided by IAI allow for easy programming without the need to

worry about detailed I/O assignments. The basic functions provided include this addressing function and

a range check function for certain input parameters.

These function blocks/functions can be utilized only with the Siemens S7 Series. Short sample programs

are provided in the appendix for reference.

The following function blocks/functions are supported. *2, *3

Name Overview Note

GW CTL ** Start/stop Gateway-controller communication and specify a linked axis.

RC NVC ** Execute movement by numerical specification.

RC ESYNC ** Execute movement by simple numerical specification.

RC BCMOVP ** Broadcast a movement start command. *1

RC READ ** Read RC data (POS table data, current position, alarm code). *1

RC WRITE ** Write RC data (POS table data). *1

RC PROM ** Convert position data into ROM. *1

RC PMSL ** Switch between PIO and Modbus. *1

*1) Use only one of these function blocks at a time, as they all access the same area.

These function blocks control command transmission, but do not monitor the

response time. The response time must be monitored by the application if necessary.

*2) In the common input parameter LADDR, set the Gateway I/O head addresses

set in HW Config. The initial input and output address numbers must be the

same, and the address numbers must be consecutive.

*3) All function blocks/functions use address register 1 (AR1). Exercise caution if this