PROGRAM DATA_TO_MIS
VAR
TF_SPACE_CMD_POS_CALC:TF_AXIS_TO_SPACE;//数据类型为TF_AXIS_TO_SPACE
CG_SPACE_CMD_POS_CALC:CG_AXIS_TO_SPACE;
TF_Y_DRV_ACT_TO_MIS:LREAL; //SEND_BYTE 21 4BYTE
TF_Y_DRVN_ACT_TO_MIS:LREAL;//SEND_BYTE 25 4BYTE
TF_Z_DRV_ACT_TO_MIS:LREAL;//SEND_BYTE 29 4BYTE
TF_Z_DRVN_ACT_TO_MIS:LREAL;//SEND_BYTE 33 4BYTE
TF_X_ACT_TO_MIS:LREAL;//SEND_BYTE 37 4BYTE
CG_ARM1_ACT_TO_MIS:LREAL;//SEND_BYTE 41 4BYTE
CG_ARM2_ACT_TO_MIS:LREAL;//SEND_BYTE 45 4BYTE
NZ_ACT_TO_MIS:LREAL;//SEND_BYTE 49 4BYTE

问题是：

TF_SPACE_CMD_POS_CALC:TF_AXIS_TO_SPACE语句中的“TF_AXIS_TO_SPACE”是一个FB函数，函数也能做为数据类型来使用么？