Operating method for a roll stand for rolling flat rolled stock from metal, - the roll stand having an upper roll set and a lower roll set, - the upper roll set having at least one upper working roll and an upper back-up roll, and the lower roll set having at least one lower working roll and a lower back-up roll, - the roll stand being operated at least temporarily in normal operation, - the roll stand being operated in normal operation during the rolling of the flat rolled stock, - during the rolling of the flat rolled stock, a control device for the roll stand continuously -- by using first variables (RUB, RLB, φ1UB, φ1LB), which are characteristic of an eccentricity of the back-up rolls (2U, 2L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, and second variables (RUW, RLW, φ2UW, φ2LW), which are characteristic of an eccentricity of the working rolls (1U, 1L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, determining a compensation value (ε) that depends on the rotational position (φUB, φUW, φLB, (φLW) of the at least one roll (1U, 1L, 2U, 2L) of the roll stand, -- correcting a roll nip set point (s*) for the roll stand by the compensation value (ε) determined and -- adjusting a roll nip (s) of the roll stand in accordance with the corrected roll nip set point, so that the flat rolled stock is rolled by means of the roll stand in accordance with the corrected roll nip set point, characterized in that - the rotational position (φUB, φUW, φLB, (φLW) of only the working rolls (1U, 1L) or only the back-up rolls (2U, 2L) of the roll stand are detected and accepted by the control device, - in that the rotational positions (φUB, φUW, φLB, (φLW) of those rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are not detected are determined by the control device from the rotational positions (φUB, φUW, φLB, (φLW) of those rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are detected, and - in that for rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are not detected but are determined, in each case the passing of a reference rotational position is detected and supplied to the control device. - the roll stand having an upper roll set and a lower roll set, - the upper roll set having at least one upper working roll and an upper back-up roll, and the lower roll set having at least one lower working roll and a lower back-up roll, - the roll stand being operated at least temporarily in normal operation, - the roll stand being operated in normal operation during the rolling of the flat rolled stock, - during the rolling of the flat rolled stock, a control device for the roll stand continuously -- by using first variables (RUB, RLB, φ1UB, φ1LB), which are characteristic of an eccentricity of the back-up rolls (2U, 2L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, and second variables (RUW, RLW, φ2UW, φ2LW), which are characteristic of an eccentricity of the working rolls (1U, 1L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, determining a compensation value (ε) that depends on the rotational position (φUB, φUW, φLB, (φLW) of the at least one roll (1U, 1L, 2U, 2L) of the roll stand, -- correcting a roll nip set point (s*) for the roll stand by the compensation value (ε) determined and -- adjusting a roll nip (s) of the roll stand in accordance with the corrected roll nip set point, so that the flat rolled stock is rolled by means of the roll stand in accordance with the corrected roll nip set point, -- by using first variables (RUB, RLB, φ1UB, φ1LB), which are characteristic of an eccentricity of the back-up rolls (2U, 2L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, and second variables (RUW, RLW, φ2UW, φ2LW), which are characteristic of an eccentricity of the working rolls (1U, 1L) of the roll stand as a function of a rotational position (φUB, φUW, φLB, (φLW) of at least one roll (1U, 1L, 2U, 2L) of the roll stand, determining a compensation value (ε) that depends on the rotational position (φUB, φUW, φLB, (φLW) of the at least one roll (1U, 1L, 2U, 2L) of the roll stand, -- correcting a roll nip set point (s*) for the roll stand by the compensation value (ε) determined and -- adjusting a roll nip (s) of the roll stand in accordance with the corrected roll nip set point, - the rotational position (φUB, φUW, φLB, (φLW) of only the working rolls (1U, 1L) or only the back-up rolls (2U, 2L) of the roll stand are detected and accepted by the control device, - in that the rotational positions (φUB, φUW, φLB, (φLW) of those rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are not detected are determined by the control device from the rotational positions (φUB, φUW, φLB, (φLW) of those rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are detected, and - in that for rolls (1U, 1L, 2U, 2L) whose rotational positions (φUB, φUW, φLB, (φLW) are not detected but are determined, in each case the passing of a reference rotational position is detected and supplied to the control device.